diff --git a/.gitignore b/.gitignore
index 62a8bf1bc..ec429a96f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -64,3 +64,5 @@ java/javadoc
 scan_build_report/
 t
 LOG
+
+db_logs/
diff --git a/db/db_test.cc b/db/db_test.cc
index 1d2fdd851..719d84fcb 100644
--- a/db/db_test.cc
+++ b/db/db_test.cc
@@ -1189,6 +1189,12 @@ bool MinLevelToCompress(CompressionType& type, Options& options, int wbits,
   } else if (LZ4_Supported()) {
     type = kLZ4Compression;
     fprintf(stderr, "using lz4\n");
+  } else if (XPRESS_Supported()) {
+    type = kXpressCompression;
+    fprintf(stderr, "using xpress\n");
+  } else if (ZSTD_Supported()) {
+    type = kZSTDNotFinalCompression;
+    fprintf(stderr, "using ZSTD\n");
   } else {
     fprintf(stderr, "skipping test, compression disabled\n");
     return false;
@@ -4685,6 +4691,75 @@ TEST_F(DBTest, EncodeDecompressedBlockSizeTest) {
   }
 }
 
+TEST_F(DBTest, CompressionStatsTest) {
+  CompressionType type;
+
+  if (Snappy_Supported()) {
+    type = kSnappyCompression;
+    fprintf(stderr, "using snappy\n");
+  } else if (Zlib_Supported()) {
+    type = kZlibCompression;
+    fprintf(stderr, "using zlib\n");
+  } else if (BZip2_Supported()) {
+    type = kBZip2Compression;
+    fprintf(stderr, "using bzip2\n");
+  } else if (LZ4_Supported()) {
+    type = kLZ4Compression;
+    fprintf(stderr, "using lz4\n");
+  } else if (XPRESS_Supported()) {
+    type = kXpressCompression;
+    fprintf(stderr, "using xpress\n");
+  } else if (ZSTD_Supported()) {
+    type = kZSTDNotFinalCompression;
+    fprintf(stderr, "using ZSTD\n");
+  } else {
+    fprintf(stderr, "skipping test, compression disabled\n");
+    return;
+  }
+
+  Options options = CurrentOptions();
+  options.compression = type;
+  options.statistics = rocksdb::CreateDBStatistics();
+  options.statistics->stats_level_ = StatsLevel::kAll;
+  DestroyAndReopen(options);
+
+  int kNumKeysWritten = 100000;
+
+  // Check that compressions occur and are counted when compression is turned on
+  Random rnd(301);
+  for (int i = 0; i < kNumKeysWritten; ++i) {
+    // compressible string
+    ASSERT_OK(Put(Key(i), RandomString(&rnd, 128) + std::string(128, 'a')));
+  }
+  ASSERT_GT(options.statistics->getTickerCount(NUMBER_BLOCK_COMPRESSED), 0);
+
+  for (int i = 0; i < kNumKeysWritten; ++i) {
+    auto r = Get(Key(i));
+  }
+  ASSERT_GT(options.statistics->getTickerCount(NUMBER_BLOCK_DECOMPRESSED), 0);
+
+  options.compression = kNoCompression;
+  DestroyAndReopen(options);
+  uint64_t currentCompressions =
+            options.statistics->getTickerCount(NUMBER_BLOCK_COMPRESSED);
+  uint64_t currentDecompressions =
+            options.statistics->getTickerCount(NUMBER_BLOCK_DECOMPRESSED);
+
+  // Check that compressions do not occur when turned off
+  for (int i = 0; i < kNumKeysWritten; ++i) {
+    // compressible string
+    ASSERT_OK(Put(Key(i), RandomString(&rnd, 128) + std::string(128, 'a')));
+  }
+  ASSERT_EQ(options.statistics->getTickerCount(NUMBER_BLOCK_COMPRESSED)
+            - currentCompressions, 0);
+
+  for (int i = 0; i < kNumKeysWritten; ++i) {
+    auto r = Get(Key(i));
+  }
+  ASSERT_EQ(options.statistics->getTickerCount(NUMBER_BLOCK_DECOMPRESSED)
+            - currentDecompressions, 0);
+}
+
 TEST_F(DBTest, MutexWaitStatsDisabledByDefault) {
   Options options = CurrentOptions();
   options.create_if_missing = true;
diff --git a/db/plain_table_db_test.cc b/db/plain_table_db_test.cc
index a268fc627..9d3803f9e 100644
--- a/db/plain_table_db_test.cc
+++ b/db/plain_table_db_test.cc
@@ -331,20 +331,19 @@ class TestPlainTableFactory : public PlainTableFactory {
     TableProperties* props = nullptr;
     auto s =
         ReadTableProperties(file.get(), file_size, kPlainTableMagicNumber,
-                            table_reader_options.ioptions.env,
-                            table_reader_options.ioptions.info_log, &props);
+                            table_reader_options.ioptions, &props);
     EXPECT_TRUE(s.ok());
 
     if (store_index_in_file_) {
       BlockHandle bloom_block_handle;
       s = FindMetaBlock(file.get(), file_size, kPlainTableMagicNumber,
-                        table_reader_options.ioptions.env,
+                        table_reader_options.ioptions,
                         BloomBlockBuilder::kBloomBlock, &bloom_block_handle);
       EXPECT_TRUE(s.ok());
 
       BlockHandle index_block_handle;
       s = FindMetaBlock(file.get(), file_size, kPlainTableMagicNumber,
-                        table_reader_options.ioptions.env,
+                        table_reader_options.ioptions,
                         PlainTableIndexBuilder::kPlainTableIndexBlock,
                         &index_block_handle);
       EXPECT_TRUE(s.ok());
diff --git a/db/table_properties_collector_test.cc b/db/table_properties_collector_test.cc
index 6192ca08d..203317267 100644
--- a/db/table_properties_collector_test.cc
+++ b/db/table_properties_collector_test.cc
@@ -276,7 +276,7 @@ void TestCustomizedTablePropertiesCollector(
           new test::StringSource(fwf->contents())));
   TableProperties* props;
   Status s = ReadTableProperties(fake_file_reader.get(), fwf->contents().size(),
-                                 magic_number, Env::Default(), nullptr, &props);
+                                 magic_number, ioptions, &props);
   std::unique_ptr<TableProperties> props_guard(props);
   ASSERT_OK(s);
 
@@ -417,7 +417,7 @@ void TestInternalKeyPropertiesCollector(
     TableProperties* props;
     Status s =
         ReadTableProperties(reader.get(), fwf->contents().size(), magic_number,
-                            Env::Default(), nullptr, &props);
+                            ioptions, &props);
     ASSERT_OK(s);
 
     std::unique_ptr<TableProperties> props_guard(props);
diff --git a/db/version_set.cc b/db/version_set.cc
index 6ded4fdb5..8a858ddaf 100644
--- a/db/version_set.cc
+++ b/db/version_set.cc
@@ -597,8 +597,7 @@ Status Version::GetTableProperties(std::shared_ptr<const TableProperties>* tp,
       new RandomAccessFileReader(std::move(file)));
   s = ReadTableProperties(
       file_reader.get(), file_meta->fd.GetFileSize(),
-      Footer::kInvalidTableMagicNumber /* table's magic number */, vset_->env_,
-      ioptions->info_log, &raw_table_properties);
+      Footer::kInvalidTableMagicNumber /* table's magic number */, *ioptions, &raw_table_properties);
   if (!s.ok()) {
     return s;
   }
diff --git a/include/rocksdb/statistics.h b/include/rocksdb/statistics.h
index 80a61fee3..97ba54bf0 100644
--- a/include/rocksdb/statistics.h
+++ b/include/rocksdb/statistics.h
@@ -179,6 +179,11 @@ enum Tickers : uint32_t {
   NUMBER_SUPERVERSION_ACQUIRES,
   NUMBER_SUPERVERSION_RELEASES,
   NUMBER_SUPERVERSION_CLEANUPS,
+
+  // # of compressions/decompressions executed
+  NUMBER_BLOCK_COMPRESSED,
+  NUMBER_BLOCK_DECOMPRESSED,
+
   NUMBER_BLOCK_NOT_COMPRESSED,
   MERGE_OPERATION_TOTAL_TIME,
   FILTER_OPERATION_TOTAL_TIME,
@@ -269,6 +274,8 @@ const std::vector<std::pair<Tickers, std::string>> TickersNameMap = {
     {NUMBER_SUPERVERSION_ACQUIRES, "rocksdb.number.superversion_acquires"},
     {NUMBER_SUPERVERSION_RELEASES, "rocksdb.number.superversion_releases"},
     {NUMBER_SUPERVERSION_CLEANUPS, "rocksdb.number.superversion_cleanups"},
+    {NUMBER_BLOCK_COMPRESSED, "rocksdb.number.block.compressed"},
+    {NUMBER_BLOCK_DECOMPRESSED, "rocksdb.number.block.decompressed"},
     {NUMBER_BLOCK_NOT_COMPRESSED, "rocksdb.number.block.not_compressed"},
     {MERGE_OPERATION_TOTAL_TIME, "rocksdb.merge.operation.time.nanos"},
     {FILTER_OPERATION_TOTAL_TIME, "rocksdb.filter.operation.time.nanos"},
@@ -313,6 +320,14 @@ enum Histograms : uint32_t {
   BYTES_PER_READ,
   BYTES_PER_WRITE,
   BYTES_PER_MULTIGET,
+
+  // number of bytes compressed/decompressed
+  // number of bytes is when uncompressed; i.e. before/after respectively
+  BYTES_COMPRESSED,
+  BYTES_DECOMPRESSED,
+  COMPRESSION_TIMES_NANOS,
+  DECOMPRESSION_TIMES_NANOS,
+
   HISTOGRAM_ENUM_MAX,  // TODO(ldemailly): enforce HistogramsNameMap match
 };
 
@@ -343,6 +358,10 @@ const std::vector<std::pair<Histograms, std::string>> HistogramsNameMap = {
     {BYTES_PER_READ, "rocksdb.bytes.per.read"},
     {BYTES_PER_WRITE, "rocksdb.bytes.per.write"},
     {BYTES_PER_MULTIGET, "rocksdb.bytes.per.multiget"},
+    {BYTES_COMPRESSED, "rocksdb.bytes.compressed"},
+    {BYTES_DECOMPRESSED, "rocksdb.bytes.decompressed"},
+    {COMPRESSION_TIMES_NANOS, "rocksdb.compression.times.nanos"},
+    {DECOMPRESSION_TIMES_NANOS, "rocksdb.decompression.times.nanos"},
 };
 
 struct HistogramData {
@@ -357,6 +376,9 @@ enum StatsLevel {
   // Collect all stats except the counters requiring to get time inside the
   // mutex lock.
   kExceptTimeForMutex,
+  // Collect all stats expect time inside mutex lock AND time spent on
+  // compression
+  kExceptDetailedTimers,
   // Collect all stats, including measuring duration of mutex operations.
   // If getting time is expensive on the platform to run, it can
   // reduce scalability to more threads, especially for writes.
diff --git a/table/block_based_table_builder.cc b/table/block_based_table_builder.cc
index 627141149..21720bdb7 100644
--- a/table/block_based_table_builder.cc
+++ b/table/block_based_table_builder.cc
@@ -651,11 +651,16 @@ void BlockBasedTableBuilder::WriteBlock(const Slice& raw_block_contents,
   auto type = r->compression_type;
   Slice block_contents;
   bool abort_compression = false;
+  
+  StopWatchNano timer(r->ioptions.env,
+    ShouldReportDetailedTime(r->ioptions.env, r->ioptions.statistics));
+
   if (raw_block_contents.size() < kCompressionSizeLimit) {
     Slice compression_dict;
     if (is_data_block && r->compression_dict && r->compression_dict->size()) {
       compression_dict = *r->compression_dict;
     }
+
     block_contents = CompressBlock(raw_block_contents, r->compression_opts,
                                    &type, r->table_options.format_version,
                                    compression_dict, &r->compressed_output);
@@ -668,7 +673,8 @@ void BlockBasedTableBuilder::WriteBlock(const Slice& raw_block_contents,
       BlockContents contents;
       Status stat = UncompressBlockContentsForCompressionType(
           block_contents.data(), block_contents.size(), &contents,
-          r->table_options.format_version, compression_dict, type);
+          r->table_options.format_version, compression_dict, type,
+          r->ioptions);
 
       if (stat.ok()) {
         bool compressed_ok = contents.data.compare(raw_block_contents) == 0;
@@ -698,6 +704,15 @@ void BlockBasedTableBuilder::WriteBlock(const Slice& raw_block_contents,
     type = kNoCompression;
     block_contents = raw_block_contents;
   }
+  else if (type != kNoCompression &&
+            ShouldReportDetailedTime(r->ioptions.env, 
+              r->ioptions.statistics)) {
+    MeasureTime(r->ioptions.statistics, COMPRESSION_TIMES_NANOS, 
+      timer.ElapsedNanos());
+    MeasureTime(r->ioptions.statistics, BYTES_COMPRESSED, 
+      raw_block_contents.size());
+    RecordTick(r->ioptions.statistics, NUMBER_BLOCK_COMPRESSED);
+  }
 
   WriteRawBlock(block_contents, type, handle);
   r->compressed_output.clear();
diff --git a/table/block_based_table_reader.cc b/table/block_based_table_reader.cc
index efc619222..1f95755ad 100644
--- a/table/block_based_table_reader.cc
+++ b/table/block_based_table_reader.cc
@@ -60,14 +60,13 @@ namespace {
 //    dictionary.
 Status ReadBlockFromFile(RandomAccessFileReader* file, const Footer& footer,
                          const ReadOptions& options, const BlockHandle& handle,
-                         std::unique_ptr<Block>* result, Env* env,
+                         std::unique_ptr<Block>* result,
+                         const ImmutableCFOptions &ioptions,
                          bool do_uncompress, const Slice& compression_dict,
-                         const PersistentCacheOptions& cache_options,
-                         Logger* info_log) {
+                         const PersistentCacheOptions& cache_options) {
   BlockContents contents;
-  Status s = ReadBlockContents(file, footer, options, handle, &contents, env,
-                               do_uncompress, compression_dict, cache_options,
-                               info_log);
+  Status s = ReadBlockContents(file, footer, options, handle, &contents, ioptions,
+                               do_uncompress, compression_dict, cache_options);
   if (s.ok()) {
     result->reset(new Block(std::move(contents)));
   }
@@ -177,19 +176,18 @@ class BinarySearchIndexReader : public IndexReader {
   // On success, index_reader will be populated; otherwise it will remain
   // unmodified.
   static Status Create(RandomAccessFileReader* file, const Footer& footer,
-                       const BlockHandle& index_handle, Env* env,
+                       const BlockHandle& index_handle,
+                       const ImmutableCFOptions &ioptions,
                        const Comparator* comparator, IndexReader** index_reader,
-                       const PersistentCacheOptions& cache_options,
-                       Statistics* statistics) {
+                       const PersistentCacheOptions& cache_options) {
     std::unique_ptr<Block> index_block;
     auto s = ReadBlockFromFile(file, footer, ReadOptions(), index_handle,
-                               &index_block, env, true /* decompress */,
-                               Slice() /*compression dict*/, cache_options,
-                               /*info_log*/ nullptr);
+                               &index_block, ioptions, true /* decompress */,
+                               Slice() /*compression dict*/, cache_options);
 
     if (s.ok()) {
       *index_reader = new BinarySearchIndexReader(
-          comparator, std::move(index_block), statistics);
+          comparator, std::move(index_block), ioptions.statistics);
     }
 
     return s;
@@ -226,15 +224,15 @@ class HashIndexReader : public IndexReader {
  public:
   static Status Create(
       const SliceTransform* hash_key_extractor, const Footer& footer,
-      RandomAccessFileReader* file, Env* env, const Comparator* comparator,
-      const BlockHandle& index_handle, InternalIterator* meta_index_iter,
-      IndexReader** index_reader, bool hash_index_allow_collision,
-      const PersistentCacheOptions& cache_options, Statistics* statistics) {
+      RandomAccessFileReader* file, const ImmutableCFOptions &ioptions,
+      const Comparator* comparator, const BlockHandle& index_handle,
+      InternalIterator* meta_index_iter, IndexReader** index_reader, 
+      bool hash_index_allow_collision,
+      const PersistentCacheOptions& cache_options) {
     std::unique_ptr<Block> index_block;
     auto s = ReadBlockFromFile(file, footer, ReadOptions(), index_handle,
-                               &index_block, env, true /* decompress */,
-                               Slice() /*compression dict*/, cache_options,
-                               /*info_log*/ nullptr);
+                               &index_block, ioptions, true /* decompress */,
+                               Slice() /*compression dict*/, cache_options);
 
     if (!s.ok()) {
       return s;
@@ -245,7 +243,8 @@ class HashIndexReader : public IndexReader {
     // So, Create will succeed regardless, from this point on.
 
     auto new_index_reader =
-        new HashIndexReader(comparator, std::move(index_block), statistics);
+        new HashIndexReader(comparator, std::move(index_block),
+          ioptions.statistics);
     *index_reader = new_index_reader;
 
     // Get prefixes block
@@ -269,14 +268,14 @@ class HashIndexReader : public IndexReader {
     // Read contents for the blocks
     BlockContents prefixes_contents;
     s = ReadBlockContents(file, footer, ReadOptions(), prefixes_handle,
-                          &prefixes_contents, env, true /* decompress */,
+                          &prefixes_contents, ioptions, true /* decompress */,
                           Slice() /*compression dict*/, cache_options);
     if (!s.ok()) {
       return s;
     }
     BlockContents prefixes_meta_contents;
     s = ReadBlockContents(file, footer, ReadOptions(), prefixes_meta_handle,
-                          &prefixes_meta_contents, env, true /* decompress */,
+                          &prefixes_meta_contents, ioptions, true /* decompress */,
                           Slice() /*compression dict*/, cache_options);
     if (!s.ok()) {
       // TODO: log error
@@ -547,7 +546,7 @@ Status BlockBasedTable::Open(const ImmutableCFOptions& ioptions,
       PersistentCacheOptions(rep->table_options.persistent_cache,
                              std::string(rep->persistent_cache_key_prefix,
                                          rep->persistent_cache_key_prefix_size),
-                             rep->ioptions.statistics);
+                                         rep->ioptions.statistics);
 
   // Read meta index
   std::unique_ptr<Block> meta;
@@ -585,8 +584,7 @@ Status BlockBasedTable::Open(const ImmutableCFOptions& ioptions,
     TableProperties* table_properties = nullptr;
     if (s.ok()) {
       s = ReadProperties(meta_iter->value(), rep->file.get(), rep->footer,
-                         rep->ioptions.env, rep->ioptions.info_log,
-                         &table_properties);
+                         rep->ioptions, &table_properties);
     }
 
     if (!s.ok()) {
@@ -613,7 +611,7 @@ Status BlockBasedTable::Open(const ImmutableCFOptions& ioptions,
     // true.
     unique_ptr<BlockContents> compression_dict_block{new BlockContents()};
     s = rocksdb::ReadMetaBlock(rep->file.get(), file_size,
-                               kBlockBasedTableMagicNumber, rep->ioptions.env,
+                               kBlockBasedTableMagicNumber, rep->ioptions,
                                rocksdb::kCompressionDictBlock,
                                compression_dict_block.get());
     if (!s.ok()) {
@@ -745,9 +743,9 @@ Status BlockBasedTable::ReadMetaBlock(Rep* rep,
   std::unique_ptr<Block> meta;
   Status s = ReadBlockFromFile(
       rep->file.get(), rep->footer, ReadOptions(),
-      rep->footer.metaindex_handle(), &meta, rep->ioptions.env,
+      rep->footer.metaindex_handle(), &meta, rep->ioptions,
       true /* decompress */, Slice() /*compression dict*/,
-      rep->persistent_cache_options, rep->ioptions.info_log);
+      rep->persistent_cache_options);
 
   if (!s.ok()) {
     Log(InfoLogLevel::ERROR_LEVEL, rep->ioptions.info_log,
@@ -764,13 +762,14 @@ Status BlockBasedTable::ReadMetaBlock(Rep* rep,
 
 Status BlockBasedTable::GetDataBlockFromCache(
     const Slice& block_cache_key, const Slice& compressed_block_cache_key,
-    Cache* block_cache, Cache* block_cache_compressed, Statistics* statistics,
-    const ReadOptions& read_options,
+    Cache* block_cache, Cache* block_cache_compressed,
+    const ImmutableCFOptions &ioptions, const ReadOptions& read_options,
     BlockBasedTable::CachableEntry<Block>* block, uint32_t format_version,
     const Slice& compression_dict) {
   Status s;
   Block* compressed_block = nullptr;
   Cache::Handle* block_cache_compressed_handle = nullptr;
+  Statistics* statistics = ioptions.statistics;
 
   // Lookup uncompressed cache first
   if (block_cache != nullptr) {
@@ -811,7 +810,8 @@ Status BlockBasedTable::GetDataBlockFromCache(
   BlockContents contents;
   s = UncompressBlockContents(compressed_block->data(),
                               compressed_block->size(), &contents,
-                              format_version, compression_dict);
+                              format_version, compression_dict,
+                              ioptions);
 
   // Insert uncompressed block into block cache
   if (s.ok()) {
@@ -840,7 +840,7 @@ Status BlockBasedTable::GetDataBlockFromCache(
 Status BlockBasedTable::PutDataBlockToCache(
     const Slice& block_cache_key, const Slice& compressed_block_cache_key,
     Cache* block_cache, Cache* block_cache_compressed,
-    const ReadOptions& read_options, Statistics* statistics,
+    const ReadOptions& read_options, const ImmutableCFOptions &ioptions,
     CachableEntry<Block>* block, Block* raw_block, uint32_t format_version,
     const Slice& compression_dict) {
   assert(raw_block->compression_type() == kNoCompression ||
@@ -849,9 +849,10 @@ Status BlockBasedTable::PutDataBlockToCache(
   Status s;
   // Retrieve the uncompressed contents into a new buffer
   BlockContents contents;
+  Statistics* statistics = ioptions.statistics;
   if (raw_block->compression_type() != kNoCompression) {
     s = UncompressBlockContents(raw_block->data(), raw_block->size(), &contents,
-                                format_version, compression_dict);
+                                format_version, compression_dict, ioptions);
   }
   if (!s.ok()) {
     delete raw_block;
@@ -913,7 +914,7 @@ FilterBlockReader* BlockBasedTable::ReadFilter(Rep* rep) {
   }
   BlockContents block;
   if (!ReadBlockContents(rep->file.get(), rep->footer, ReadOptions(),
-                         rep->filter_handle, &block, rep->ioptions.env,
+                         rep->filter_handle, &block, rep->ioptions,
                          false /* decompress */, Slice() /*compression dict*/,
                          rep->persistent_cache_options)
            .ok()) {
@@ -1148,7 +1149,7 @@ InternalIterator* BlockBasedTable::NewDataBlockIterator(
     }
 
     s = GetDataBlockFromCache(
-        key, ckey, block_cache, block_cache_compressed, statistics, ro, &block,
+        key, ckey, block_cache, block_cache_compressed, rep->ioptions, ro, &block,
         rep->table_options.format_version, compression_dict);
 
     if (block.value == nullptr && !no_io && ro.fill_cache) {
@@ -1156,15 +1157,14 @@ InternalIterator* BlockBasedTable::NewDataBlockIterator(
       {
         StopWatch sw(rep->ioptions.env, statistics, READ_BLOCK_GET_MICROS);
         s = ReadBlockFromFile(rep->file.get(), rep->footer, ro, handle,
-                              &raw_block, rep->ioptions.env,
+                              &raw_block, rep->ioptions,
                               block_cache_compressed == nullptr,
-                              compression_dict, rep->persistent_cache_options,
-                              rep->ioptions.info_log);
+                              compression_dict, rep->persistent_cache_options);
       }
 
       if (s.ok()) {
         s = PutDataBlockToCache(key, ckey, block_cache, block_cache_compressed,
-                                ro, statistics, &block, raw_block.release(),
+                                ro, rep->ioptions, &block, raw_block.release(),
                                 rep->table_options.format_version,
                                 compression_dict);
       }
@@ -1184,9 +1184,8 @@ InternalIterator* BlockBasedTable::NewDataBlockIterator(
     }
     std::unique_ptr<Block> block_value;
     s = ReadBlockFromFile(rep->file.get(), rep->footer, ro, handle,
-                          &block_value, rep->ioptions.env, true /* compress */,
-                          compression_dict, rep->persistent_cache_options,
-                          rep->ioptions.info_log);
+                          &block_value, rep->ioptions, true /* compress */,
+                          compression_dict, rep->persistent_cache_options);
     if (s.ok()) {
       block.value = block_value.release();
     }
@@ -1510,8 +1509,9 @@ bool BlockBasedTable::TEST_KeyInCache(const ReadOptions& options,
                   handle, cache_key_storage);
   Slice ckey;
 
-  s = GetDataBlockFromCache(cache_key, ckey, block_cache, nullptr, nullptr,
-                            options, &block, rep_->table_options.format_version,
+  s = GetDataBlockFromCache(cache_key, ckey, block_cache, nullptr, 
+                            rep_->ioptions, options, &block,
+                            rep_->table_options.format_version,
                             rep_->compression_dict_block
                                 ? rep_->compression_dict_block->data
                                 : Slice());
@@ -1544,11 +1544,8 @@ Status BlockBasedTable::CreateIndexReader(
   }
 
   auto file = rep_->file.get();
-  auto env = rep_->ioptions.env;
   auto comparator = &rep_->internal_comparator;
   const Footer& footer = rep_->footer;
-  Statistics* stats = rep_->ioptions.statistics;
-
   if (index_type_on_file == BlockBasedTableOptions::kHashSearch &&
       rep_->ioptions.prefix_extractor == nullptr) {
     Log(InfoLogLevel::WARN_LEVEL, rep_->ioptions.info_log,
@@ -1561,8 +1558,8 @@ Status BlockBasedTable::CreateIndexReader(
   switch (index_type_on_file) {
     case BlockBasedTableOptions::kBinarySearch: {
       return BinarySearchIndexReader::Create(
-          file, footer, footer.index_handle(), env, comparator, index_reader,
-          rep_->persistent_cache_options, stats);
+          file, footer, footer.index_handle(), rep_->ioptions, comparator, 
+          index_reader, rep_->persistent_cache_options);
     }
     case BlockBasedTableOptions::kHashSearch: {
       std::unique_ptr<Block> meta_guard;
@@ -1577,8 +1574,8 @@ Status BlockBasedTable::CreateIndexReader(
               "Unable to read the metaindex block."
               " Fall back to binary search index.");
           return BinarySearchIndexReader::Create(
-              file, footer, footer.index_handle(), env, comparator,
-              index_reader, rep_->persistent_cache_options, stats);
+              file, footer, footer.index_handle(), rep_->ioptions, comparator,
+              index_reader, rep_->persistent_cache_options);
         }
         meta_index_iter = meta_iter_guard.get();
       }
@@ -1588,10 +1585,9 @@ Status BlockBasedTable::CreateIndexReader(
       rep_->internal_prefix_transform.reset(
           new InternalKeySliceTransform(rep_->ioptions.prefix_extractor));
       return HashIndexReader::Create(
-          rep_->internal_prefix_transform.get(), footer, file, env, comparator,
-          footer.index_handle(), meta_index_iter, index_reader,
-          rep_->hash_index_allow_collision, rep_->persistent_cache_options,
-          stats);
+          rep_->internal_prefix_transform.get(), footer, file, rep_->ioptions,
+          comparator, footer.index_handle(), meta_index_iter, index_reader,
+          rep_->hash_index_allow_collision, rep_->persistent_cache_options);
     }
     default: {
       std::string error_message =
@@ -1711,7 +1707,7 @@ Status BlockBasedTable::DumpTable(WritableFile* out_file) {
         BlockContents block;
         if (ReadBlockContents(
                 rep_->file.get(), rep_->footer, ReadOptions(), handle, &block,
-                rep_->ioptions.env, false /*decompress*/,
+                rep_->ioptions, false /*decompress*/,
                 Slice() /*compression dict*/, rep_->persistent_cache_options)
                 .ok()) {
           rep_->filter.reset(new BlockBasedFilterBlockReader(
diff --git a/table/block_based_table_reader.h b/table/block_based_table_reader.h
index 28447687b..84a990a6f 100644
--- a/table/block_based_table_reader.h
+++ b/table/block_based_table_reader.h
@@ -177,8 +177,8 @@ class BlockBasedTable : public TableReader {
   //    dictionary.
   static Status GetDataBlockFromCache(
       const Slice& block_cache_key, const Slice& compressed_block_cache_key,
-      Cache* block_cache, Cache* block_cache_compressed, Statistics* statistics,
-      const ReadOptions& read_options,
+      Cache* block_cache, Cache* block_cache_compressed,
+      const ImmutableCFOptions &ioptions, const ReadOptions& read_options,
       BlockBasedTable::CachableEntry<Block>* block, uint32_t format_version,
       const Slice& compression_dict);
 
@@ -195,7 +195,7 @@ class BlockBasedTable : public TableReader {
   static Status PutDataBlockToCache(
       const Slice& block_cache_key, const Slice& compressed_block_cache_key,
       Cache* block_cache, Cache* block_cache_compressed,
-      const ReadOptions& read_options, Statistics* statistics,
+      const ReadOptions& read_options, const ImmutableCFOptions &ioptions,
       CachableEntry<Block>* block, Block* raw_block, uint32_t format_version,
       const Slice& compression_dict);
 
diff --git a/table/cuckoo_table_builder_test.cc b/table/cuckoo_table_builder_test.cc
index 2fda8044e..ac5bed157 100644
--- a/table/cuckoo_table_builder_test.cc
+++ b/table/cuckoo_table_builder_test.cc
@@ -49,12 +49,16 @@ class CuckooBuilderTest : public testing::Test {
     uint64_t read_file_size;
     ASSERT_OK(env_->GetFileSize(fname, &read_file_size));
 
+	Options options;
+	options.allow_mmap_reads = true;
+	ImmutableCFOptions ioptions(options);
+
     // Assert Table Properties.
     TableProperties* props = nullptr;
     unique_ptr<RandomAccessFileReader> file_reader(
         new RandomAccessFileReader(std::move(read_file)));
     ASSERT_OK(ReadTableProperties(file_reader.get(), read_file_size,
-                                  kCuckooTableMagicNumber, env_, nullptr,
+                                  kCuckooTableMagicNumber, ioptions,
                                   &props));
     // Check unused bucket.
     std::string unused_key = props->user_collected_properties[
diff --git a/table/cuckoo_table_reader.cc b/table/cuckoo_table_reader.cc
index fb1aef2e8..f6d69154e 100644
--- a/table/cuckoo_table_reader.cc
+++ b/table/cuckoo_table_reader.cc
@@ -45,7 +45,7 @@ CuckooTableReader::CuckooTableReader(
   }
   TableProperties* props = nullptr;
   status_ = ReadTableProperties(file_.get(), file_size, kCuckooTableMagicNumber,
-      ioptions.env, ioptions.info_log, &props);
+      ioptions, &props);
   if (!status_.ok()) {
     return;
   }
diff --git a/table/format.cc b/table/format.cc
index be86ef8f8..3675bbade 100644
--- a/table/format.cc
+++ b/table/format.cc
@@ -23,6 +23,9 @@
 #include "util/perf_context_imp.h"
 #include "util/string_util.h"
 #include "util/xxhash.h"
+#include "util/statistics.h"
+#include "util/stop_watch.h"
+
 
 namespace rocksdb {
 
@@ -39,6 +42,11 @@ const uint64_t kPlainTableMagicNumber = 0;
 #endif
 const uint32_t DefaultStackBufferSize = 5000;
 
+bool ShouldReportDetailedTime(Env* env, Statistics* stats) {
+  return env != nullptr && stats != nullptr &&
+         stats->stats_level_ > kExceptDetailedTimers;
+}
+
 void BlockHandle::EncodeTo(std::string* dst) const {
   // Sanity check that all fields have been set
   assert(offset_ != ~static_cast<uint64_t>(0));
@@ -297,10 +305,10 @@ Status ReadBlock(RandomAccessFileReader* file, const Footer& footer,
 Status ReadBlockContents(RandomAccessFileReader* file, const Footer& footer,
                          const ReadOptions& read_options,
                          const BlockHandle& handle, BlockContents* contents,
-                         Env* env, bool decompression_requested,
+                         const ImmutableCFOptions &ioptions,
+                         bool decompression_requested,
                          const Slice& compression_dict,
-                         const PersistentCacheOptions& cache_options,
-                         Logger* info_log) {
+                         const PersistentCacheOptions& cache_options) {
   Status status;
   Slice slice;
   size_t n = static_cast<size_t>(handle.size());
@@ -318,9 +326,9 @@ Status ReadBlockContents(RandomAccessFileReader* file, const Footer& footer,
       return status;
     } else {
       // uncompressed page is not found
-      if (info_log && !status.IsNotFound()) {
+      if (ioptions.info_log && !status.IsNotFound()) {
         assert(!status.ok());
-        Log(InfoLogLevel::INFO_LEVEL, info_log,
+        Log(InfoLogLevel::INFO_LEVEL, ioptions.info_log,
             "Error reading from persistent cache. %s",
             status.ToString().c_str());
       }
@@ -341,9 +349,9 @@ Status ReadBlockContents(RandomAccessFileReader* file, const Footer& footer,
     used_buf = heap_buf.get();
     slice = Slice(heap_buf.get(), n);
   } else {
-    if (info_log && !status.IsNotFound()) {
+    if (ioptions.info_log && !status.IsNotFound()) {
       assert(!status.ok());
-      Log(InfoLogLevel::INFO_LEVEL, info_log,
+      Log(InfoLogLevel::INFO_LEVEL, ioptions.info_log,
           "Error reading from persistent cache. %s", status.ToString().c_str());
     }
     // cache miss read from device
@@ -378,7 +386,8 @@ Status ReadBlockContents(RandomAccessFileReader* file, const Footer& footer,
   if (decompression_requested && compression_type != kNoCompression) {
     // compressed page, uncompress, update cache
     status = UncompressBlockContents(slice.data(), n, contents,
-                                     footer.version(), compression_dict);
+                                     footer.version(), compression_dict,
+                                     ioptions);
   } else if (slice.data() != used_buf) {
     // the slice content is not the buffer provided
     *contents = BlockContents(Slice(slice.data(), n), false, compression_type);
@@ -405,11 +414,13 @@ Status ReadBlockContents(RandomAccessFileReader* file, const Footer& footer,
 Status UncompressBlockContentsForCompressionType(
     const char* data, size_t n, BlockContents* contents,
     uint32_t format_version, const Slice& compression_dict,
-    CompressionType compression_type) {
+    CompressionType compression_type, const ImmutableCFOptions &ioptions) {
   std::unique_ptr<char[]> ubuf;
 
   assert(compression_type != kNoCompression && "Invalid compression type");
 
+  StopWatchNano timer(ioptions.env,
+    ShouldReportDetailedTime(ioptions.env, ioptions.statistics));
   int decompress_size = 0;
   switch (compression_type) {
     case kSnappyCompression: {
@@ -501,6 +512,13 @@ Status UncompressBlockContentsForCompressionType(
       return Status::Corruption("bad block type");
   }
 
+  if(ShouldReportDetailedTime(ioptions.env, ioptions.statistics)){
+    MeasureTime(ioptions.statistics, DECOMPRESSION_TIMES_NANOS,
+      timer.ElapsedNanos());
+    MeasureTime(ioptions.statistics, BYTES_DECOMPRESSED, contents->data.size());
+    RecordTick(ioptions.statistics, NUMBER_BLOCK_DECOMPRESSED);
+  }
+
   return Status::OK();
 }
 
@@ -513,11 +531,12 @@ Status UncompressBlockContentsForCompressionType(
 // format_version is the block format as defined in include/rocksdb/table.h
 Status UncompressBlockContents(const char* data, size_t n,
                                BlockContents* contents, uint32_t format_version,
-                               const Slice& compression_dict) {
+                               const Slice& compression_dict,
+                               const ImmutableCFOptions &ioptions) {
   assert(data[n] != kNoCompression);
   return UncompressBlockContentsForCompressionType(
       data, n, contents, format_version, compression_dict,
-      (CompressionType)data[n]);
+      (CompressionType)data[n], ioptions);
 }
 
 }  // namespace rocksdb
diff --git a/table/format.h b/table/format.h
index 2ca7d2520..571659d59 100644
--- a/table/format.h
+++ b/table/format.h
@@ -24,6 +24,8 @@ class Block;
 class RandomAccessFile;
 struct ReadOptions;
 
+extern bool ShouldReportDetailedTime(Env* env, Statistics* stats);
+
 // the length of the magic number in bytes.
 const int kMagicNumberLengthByte = 8;
 
@@ -212,10 +214,9 @@ struct BlockContents {
 extern Status ReadBlockContents(
     RandomAccessFileReader* file, const Footer& footer,
     const ReadOptions& options, const BlockHandle& handle,
-    BlockContents* contents, Env* env, bool do_uncompress = true,
-    const Slice& compression_dict = Slice(),
-    const PersistentCacheOptions& cache_options = PersistentCacheOptions(),
-    Logger* info_log = nullptr);
+    BlockContents* contents, const ImmutableCFOptions &ioptions,
+    bool do_uncompress = true, const Slice& compression_dict = Slice(),
+    const PersistentCacheOptions& cache_options = PersistentCacheOptions());
 
 // The 'data' points to the raw block contents read in from file.
 // This method allocates a new heap buffer and the raw block
@@ -227,7 +228,8 @@ extern Status ReadBlockContents(
 extern Status UncompressBlockContents(const char* data, size_t n,
                                       BlockContents* contents,
                                       uint32_t compress_format_version,
-                                      const Slice& compression_dict);
+                                      const Slice& compression_dict,
+                                      const ImmutableCFOptions &ioptions);
 
 // This is an extension to UncompressBlockContents that accepts
 // a specific compression type. This is used by un-wrapped blocks
@@ -235,7 +237,7 @@ extern Status UncompressBlockContents(const char* data, size_t n,
 extern Status UncompressBlockContentsForCompressionType(
     const char* data, size_t n, BlockContents* contents,
     uint32_t compress_format_version, const Slice& compression_dict,
-    CompressionType compression_type);
+    CompressionType compression_type, const ImmutableCFOptions &ioptions);
 
 // Implementation details follow.  Clients should ignore,
 
diff --git a/table/meta_blocks.cc b/table/meta_blocks.cc
index 2cbe9eca7..e98a638e0 100644
--- a/table/meta_blocks.cc
+++ b/table/meta_blocks.cc
@@ -150,7 +150,7 @@ bool NotifyCollectTableCollectorsOnFinish(
 }
 
 Status ReadProperties(const Slice& handle_value, RandomAccessFileReader* file,
-                      const Footer& footer, Env* env, Logger* logger,
+                      const Footer& footer, const ImmutableCFOptions &ioptions, 
                       TableProperties** table_properties) {
   assert(table_properties);
 
@@ -165,7 +165,7 @@ Status ReadProperties(const Slice& handle_value, RandomAccessFileReader* file,
   read_options.verify_checksums = false;
   Status s;
   s = ReadBlockContents(file, footer, read_options, handle, &block_contents,
-                        env, false /* decompress */);
+                        ioptions, false /* decompress */);
 
   if (!s.ok()) {
     return s;
@@ -219,7 +219,8 @@ Status ReadProperties(const Slice& handle_value, RandomAccessFileReader* file,
         auto error_msg =
           "Detect malformed value in properties meta-block:"
           "\tkey: " + key + "\tval: " + raw_val.ToString();
-        Log(InfoLogLevel::ERROR_LEVEL, logger, "%s", error_msg.c_str());
+        Log(InfoLogLevel::ERROR_LEVEL, ioptions.info_log, "%s",
+        error_msg.c_str());
         continue;
       }
       *(pos->second) = val;
@@ -251,8 +252,9 @@ Status ReadProperties(const Slice& handle_value, RandomAccessFileReader* file,
 }
 
 Status ReadTableProperties(RandomAccessFileReader* file, uint64_t file_size,
-                           uint64_t table_magic_number, Env* env,
-                           Logger* info_log, TableProperties** properties) {
+                           uint64_t table_magic_number,
+                           const ImmutableCFOptions &ioptions,
+                           TableProperties** properties) {
   // -- Read metaindex block
   Footer footer;
   auto s = ReadFooterFromFile(file, file_size, &footer, table_magic_number);
@@ -265,7 +267,7 @@ Status ReadTableProperties(RandomAccessFileReader* file, uint64_t file_size,
   ReadOptions read_options;
   read_options.verify_checksums = false;
   s = ReadBlockContents(file, footer, read_options, metaindex_handle,
-                        &metaindex_contents, env, false /* decompress */);
+                        &metaindex_contents, ioptions, false /* decompress */);
   if (!s.ok()) {
     return s;
   }
@@ -282,8 +284,7 @@ Status ReadTableProperties(RandomAccessFileReader* file, uint64_t file_size,
 
   TableProperties table_properties;
   if (found_properties_block == true) {
-    s = ReadProperties(meta_iter->value(), file, footer, env, info_log,
-                       properties);
+    s = ReadProperties(meta_iter->value(), file, footer, ioptions, properties);
   } else {
     s = Status::NotFound();
   }
@@ -305,7 +306,8 @@ Status FindMetaBlock(InternalIterator* meta_index_iter,
 }
 
 Status FindMetaBlock(RandomAccessFileReader* file, uint64_t file_size,
-                     uint64_t table_magic_number, Env* env,
+                     uint64_t table_magic_number,
+                     const ImmutableCFOptions &ioptions,
                      const std::string& meta_block_name,
                      BlockHandle* block_handle) {
   Footer footer;
@@ -319,7 +321,7 @@ Status FindMetaBlock(RandomAccessFileReader* file, uint64_t file_size,
   ReadOptions read_options;
   read_options.verify_checksums = false;
   s = ReadBlockContents(file, footer, read_options, metaindex_handle,
-                        &metaindex_contents, env, false /* do decompression */);
+                        &metaindex_contents, ioptions, false /* do decompression */);
   if (!s.ok()) {
     return s;
   }
@@ -332,7 +334,8 @@ Status FindMetaBlock(RandomAccessFileReader* file, uint64_t file_size,
 }
 
 Status ReadMetaBlock(RandomAccessFileReader* file, uint64_t file_size,
-                     uint64_t table_magic_number, Env* env,
+                     uint64_t table_magic_number,
+                     const ImmutableCFOptions &ioptions,
                      const std::string& meta_block_name,
                      BlockContents* contents) {
   Status status;
@@ -348,7 +351,8 @@ Status ReadMetaBlock(RandomAccessFileReader* file, uint64_t file_size,
   ReadOptions read_options;
   read_options.verify_checksums = false;
   status = ReadBlockContents(file, footer, read_options, metaindex_handle,
-                             &metaindex_contents, env, false /* decompress */);
+                             &metaindex_contents, ioptions,
+                             false /* decompress */);
   if (!status.ok()) {
     return status;
   }
@@ -368,7 +372,7 @@ Status ReadMetaBlock(RandomAccessFileReader* file, uint64_t file_size,
 
   // Reading metablock
   return ReadBlockContents(file, footer, read_options, block_handle, contents,
-                           env, false /* decompress */);
+                           ioptions, false /* decompress */);
 }
 
 }  // namespace rocksdb
diff --git a/table/meta_blocks.h b/table/meta_blocks.h
index ab4f7e127..99084d790 100644
--- a/table/meta_blocks.h
+++ b/table/meta_blocks.h
@@ -94,7 +94,7 @@ bool NotifyCollectTableCollectorsOnFinish(
 //          *table_properties will point to a heap-allocated TableProperties
 //          object, otherwise value of `table_properties` will not be modified.
 Status ReadProperties(const Slice& handle_value, RandomAccessFileReader* file,
-                      const Footer& footer, Env* env, Logger* logger,
+                      const Footer& footer, const ImmutableCFOptions &ioptions,
                       TableProperties** table_properties);
 
 // Directly read the properties from the properties block of a plain table.
@@ -102,8 +102,9 @@ Status ReadProperties(const Slice& handle_value, RandomAccessFileReader* file,
 //          *table_properties will point to a heap-allocated TableProperties
 //          object, otherwise value of `table_properties` will not be modified.
 Status ReadTableProperties(RandomAccessFileReader* file, uint64_t file_size,
-                           uint64_t table_magic_number, Env* env,
-                           Logger* info_log, TableProperties** properties);
+                           uint64_t table_magic_number,
+                           const ImmutableCFOptions &ioptions,
+                           TableProperties** properties);
 
 // Find the meta block from the meta index block.
 Status FindMetaBlock(InternalIterator* meta_index_iter,
@@ -112,7 +113,8 @@ Status FindMetaBlock(InternalIterator* meta_index_iter,
 
 // Find the meta block
 Status FindMetaBlock(RandomAccessFileReader* file, uint64_t file_size,
-                     uint64_t table_magic_number, Env* env,
+                     uint64_t table_magic_number,
+                     const ImmutableCFOptions &ioptions,
                      const std::string& meta_block_name,
                      BlockHandle* block_handle);
 
@@ -120,7 +122,8 @@ Status FindMetaBlock(RandomAccessFileReader* file, uint64_t file_size,
 // from `file` and initialize `contents` with contents of this block.
 // Return Status::OK in case of success.
 Status ReadMetaBlock(RandomAccessFileReader* file, uint64_t file_size,
-                     uint64_t table_magic_number, Env* env,
+                     uint64_t table_magic_number,
+                     const ImmutableCFOptions &ioptions,
                      const std::string& meta_block_name,
                      BlockContents* contents);
 
diff --git a/table/plain_table_reader.cc b/table/plain_table_reader.cc
index a6db428e4..a5155254b 100644
--- a/table/plain_table_reader.cc
+++ b/table/plain_table_reader.cc
@@ -128,7 +128,7 @@ Status PlainTableReader::Open(const ImmutableCFOptions& ioptions,
 
   TableProperties* props = nullptr;
   auto s = ReadTableProperties(file.get(), file_size, kPlainTableMagicNumber,
-                               ioptions.env, ioptions.info_log, &props);
+                               ioptions, &props);
   if (!s.ok()) {
     return s;
   }
@@ -293,13 +293,13 @@ Status PlainTableReader::PopulateIndex(TableProperties* props,
 
   BlockContents bloom_block_contents;
   auto s = ReadMetaBlock(file_info_.file.get(), file_size_,
-                         kPlainTableMagicNumber, ioptions_.env,
+                         kPlainTableMagicNumber, ioptions_,
                          BloomBlockBuilder::kBloomBlock, &bloom_block_contents);
   bool index_in_file = s.ok();
 
   BlockContents index_block_contents;
   s = ReadMetaBlock(
-      file_info_.file.get(), file_size_, kPlainTableMagicNumber, ioptions_.env,
+      file_info_.file.get(), file_size_, kPlainTableMagicNumber, ioptions_,
       PlainTableIndexBuilder::kPlainTableIndexBlock, &index_block_contents);
 
   index_in_file &= s.ok();
diff --git a/table/table_test.cc b/table/table_test.cc
index d9cb799b5..b7b23a777 100644
--- a/table/table_test.cc
+++ b/table/table_test.cc
@@ -2064,7 +2064,7 @@ TEST_F(PlainTableTest, BasicPlainTableProperties) {
 
   TableProperties* props = nullptr;
   auto s = ReadTableProperties(file_reader.get(), ss->contents().size(),
-                               kPlainTableMagicNumber, Env::Default(), nullptr,
+                               kPlainTableMagicNumber, ioptions,
                                &props);
   std::unique_ptr<TableProperties> props_guard(props);
   ASSERT_OK(s);
diff --git a/tools/sst_dump_tool.cc b/tools/sst_dump_tool.cc
index 55326a283..4b8b92e6b 100644
--- a/tools/sst_dump_tool.cc
+++ b/tools/sst_dump_tool.cc
@@ -219,8 +219,7 @@ Status SstFileReader::ReadTableProperties(uint64_t table_magic_number,
                                           uint64_t file_size) {
   TableProperties* table_properties = nullptr;
   Status s = rocksdb::ReadTableProperties(file, file_size, table_magic_number,
-                                          options_.env, options_.info_log.get(),
-                                          &table_properties);
+                                          ioptions_, &table_properties);
   if (s.ok()) {
     table_properties_.reset(table_properties);
   } else {
diff --git a/util/coding.h b/util/coding.h
index 5bc866438..cff896d36 100644
--- a/util/coding.h
+++ b/util/coding.h
@@ -154,7 +154,8 @@ inline void EncodeFixed64(char* buf, uint64_t value) {
 // Pull the last 8 bits and cast it to a character
 inline void PutFixed32(std::string* dst, uint32_t value) {
 #if __BYTE_ORDER__ == __LITTLE_ENDIAN__
-  dst->append(static_cast<const char*>(&value), sizeof(value));
+  dst->append(const_cast<const char*>(reinterpret_cast<char*>(&value)),
+    sizeof(value));
 #else
   char buf[sizeof(value)];
   EncodeFixed32(buf, value);
@@ -164,7 +165,8 @@ inline void PutFixed32(std::string* dst, uint32_t value) {
 
 inline void PutFixed64(std::string* dst, uint64_t value) {
 #if __BYTE_ORDER__ == __LITTLE_ENDIAN__
-  dst->append(static_const<const char*>(&value), sizeof(value));
+  dst->append(const_cast<const char*>(reinterpret_cast<char*>(&value)),
+    sizeof(value));
 #else
   char buf[sizeof(value)];
   EncodeFixed64(buf, value);