benchmark: increase rocksdb block cache capacity #839
Merged
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Compared to redb (and sled), RocksDB gets way too little cache capacity (32MB), which negatively impacts its read performance. Setting it to 4 GB (same as redb) gives it a 1.5x read performance boost on my system.
I haven't updated the readme, because it's system dependent, so you would need to rerun it on yours.