Adds a README for the benchmark

README.md

@@ -22,6 +22,8 @@ Are currently implemented:
 * [Turtle](https://www.w3.org/TR/turtle/), [TriG](https://www.w3.org/TR/trig/), [N-Triples](https://www.w3.org/TR/n-triples/), [N-Quads](https://www.w3.org/TR/n-quads/) and [RDF XML](https://www.w3.org/TR/rdf-syntax-grammar/) RDF serialization formats for both data ingestion and retrieval using the [Rio library](https://github.com/Tpt/rio).
 * [SPARQL Query Results XML Format](http://www.w3.org/TR/rdf-sparql-XMLres/) and [SPARQL Query Results JSON Format](https://www.w3.org/TR/sparql11-results-json/).
 
+A preliminary benchmark [is provided](bench/README.md).
+
 ## Run the web server
 
 ### Build

bench/README.md

@@ -0,0 +1,38 @@
+BSBM
+====
+
+The [Berlin SPARQL Benchmark (BSBM)](http://wifo5-03.informatik.uni-mannheim.de/bizer/berlinsparqlbenchmark/) is a simple SPARQL benchmark.
+
+It provides a dataset generator and multiple set of queries grouped by "use cases".
+
+## Results
+
+We compare here Oxigraph with some existing SPARQL implementations (Blazegraph, Virtuoso and GraphDB).
+
+The dataset used in the following charts is generated with 10k "products" (see [its spec](http://wifo5-03.informatik.uni-mannheim.de/bizer/berlinsparqlbenchmark/spec/Dataset/index.html)). It leads to the creation of 3.5M triples.
+It has been executed on a Dell Precision 5520 with 16GB of RAM. For Oxigraph, available memory has been limited to 1GB.
+
+### Explore
+The [explore use case](http://wifo5-03.informatik.uni-mannheim.de/bizer/berlinsparqlbenchmark/spec/ExploreUseCase/index.html) is composed of 11 queries that do simple data retrieval.
+
+Query 6 existed in previous versions of the benchmark as is now removed.
+
+![explore use case results](bsbm.explore.svg)
+
+### Business Intelligence
+The [business intelligence use case](http://wifo5-03.informatik.uni-mannheim.de/bizer/berlinsparqlbenchmark/spec/BusinessIntelligenceUseCase/index.html) is composed of 8 complex analytics queries.
+
+Query 4 seems to be failing on Virtuoso and query 5 on Blazegraph and GraphDB.
+
+![explore use case results](bsbm.businessIntelligence.svg)
+
+## How to reproduce the benchmark
+
+The code of the benchmark is in the `bsbm-tools` submodule. You should pull it with a `git submodule update` before running the benchmark.
+
+To run the benchmark for Oxigraph run `bash bsbm_oxigraph.sh`. It will compile the current Oxigraph code and run the benchmark against it.
+You could tweak the number of products in the dataset and the available memory using the environment variables at the beginning of `bsbm_oxigraph.sh`.
+
+To generate the plots run `python3 bsbsm-plot.py`.
+
+Scripts are also provided for the other benchmarks (`bsbm_blazegraph.sh`, `bsbm_graphdb.sh` and `bsbm_virtuoso.sh`).

bench/bsbm-plot.py

@@ -27,7 +27,7 @@ for file in glob('bsbm.explore.*.xml'):
         val =  float(query.find('aqet').text)
         if val > 0:
             aqet[run][int(query.attrib['nr'])] = val
-plot_y_per_x_per_plot(aqet, 'query id', 'execution time (s)', 'bsbm.explore.png')
+plot_y_per_x_per_plot(aqet, 'query id', 'execution time (s)', 'bsbm.explore.svg')
 
 # BSBM business intelligence
 aqet = defaultdict(dict)
@@ -37,6 +37,6 @@ for file in glob('bsbm.businessIntelligence.*.xml'):
         val =  float(query.find('aqet').text)
         if val > 0:
             aqet[run][int(query.attrib['nr'])] = val
-plot_y_per_x_per_plot(aqet, 'query id', 'execution time (s) - log scale', 'bsbm.businessIntelligence.png', log=True)
+plot_y_per_x_per_plot(aqet, 'query id', 'execution time (s) - log scale', 'bsbm.businessIntelligence.svg', log=True)
 
 plt.show()

bench/bsbm_oxigraph.sh

@@ -1,10 +1,11 @@
 #!/usr/bin/env bash
 
-DATASET_SIZE=100000
-MEMORY_SIZE=1000000
+DATASET_SIZE=100000 # number of products in the dataset. There is around 350 triples generated by product.
+MEMORY_SIZE=1000000 # availlable memory for Oxigraph in GB. Useful to simulate low RAM machines.
+
 cd bsbm-tools
 ./generate -fc -pc ${DATASET_SIZE} -s nt -fn "explore-${DATASET_SIZE}"
-cargo build --release --manifest-path="../../server/Cargo.toml" 
+cargo build --release --manifest-path="../../server/Cargo.toml"
 (
   ulimit -d ${MEMORY_SIZE}
   ./../../target/release/oxigraph_server --file oxigraph_data