fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph

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Peter Dillinger ca7ccbe2ea Misc hashing updates / upgrades (#5909) ... Summary: - Updated our included xxhash implementation to version 0.7.2 (== the latest dev version as of 2019-10-09). - Using XXH_NAMESPACE (like other fb projects) to avoid potential name collisions. - Added fastrange64, and unit tests for it and fastrange32. These are faster alternatives to hash % range. - Use preview version of XXH3 instead of MurmurHash64A for NPHash64 -- Had to update cache_test to increase probability of passing for any given hash function. - Use fastrange64 instead of % with uses of NPHash64 -- Had to fix WritePreparedTransactionTest.CommitOfDelayedPrepared to avoid deadlock apparently caused by new hash collision. - Set default seed for NPHash64 because specifying a seed rarely makes sense for it. - Removed unnecessary include xxhash.h in a popular .h file - Rename preview version of XXH3 to XXH3p for clarity and to ease backward compatibility in case final version of XXH3 is integrated. Relying on existing unit tests for NPHash64-related changes. Each new implementation of fastrange64 passed unit tests when manipulating my local build to select it. I haven't done any integration performance tests, but I consider the improved performance of the pieces being swapped in to be well established. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5909 Differential Revision: D18125196 Pulled By: pdillinger fbshipit-source-id: f6bf83d49d20cbb2549926adf454fd035f0ecc0d		5 years ago
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alloc_tracker.cc	Move some memory related files from util/ to memory/ (#5382)	5 years ago
hash_linklist_rep.cc	Misc hashing updates / upgrades (#5909)	5 years ago
hash_linklist_rep.h	Change RocksDB License	7 years ago
hash_skiplist_rep.cc	Move some memory related files from util/ to memory/ (#5382)	5 years ago
hash_skiplist_rep.h	Change RocksDB License	7 years ago
inlineskiplist.h	Add insert hints for each writebatch (#5728)	5 years ago
inlineskiplist_test.cc	Add insert hints for each writebatch (#5728)	5 years ago
memtablerep_bench.cc	simplify include directive involving inttypes (#5402)	5 years ago
skiplist.h	Use delete to disable automatic generated methods. (#5009)	5 years ago
skiplist_test.cc	Move some memory related files from util/ to memory/ (#5382)	5 years ago
skiplistrep.cc	Add insert hints for each writebatch (#5728)	5 years ago
stl_wrappers.h	Consolidate hash function used for non-persistent data in a new function (#5155)	5 years ago
vectorrep.cc	Move some memory related files from util/ to memory/ (#5382)	5 years ago
write_buffer_manager.cc	WriteBufferManager's dummy entry size to block cache 1MB -> 256KB (#5175)	5 years ago
write_buffer_manager_test.cc	Charge block cache for cache internal usage (#5797)	5 years ago