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performance.md

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Performance

I've compared Redka with Redis using redis-benchmark with the following parameters:

  • 10 parallel connections
  • 1000000 requests
  • 10000 randomized keys
  • GET/SET commands

SQLite settings:

pragma journal_mode = wal;
pragma synchronous = normal;
pragma temp_store = memory;
pragma mmap_size = 268435456;
pragma foreign_keys = on;

Hardware: Apple M1 8-core CPU, 16GB RAM

Redis:

redis-server --appendonly no
redis-benchmark -p 6379 -q -c 10 -n 1000000 -r 10000 -t get,set

SET: 133262.25 requests per second, p50=0.055 msec
GET: 139217.59 requests per second, p50=0.055 msec

Redka (in-memory):

./redka -p 6380
redis-benchmark -p 6380 -q -c 10 -n 1000000 -r 10000 -t get,set

SET: 36188.62  requests per second, p50=0.167 msec
GET: 104405.93 requests per second, p50=0.063 msec

Redka (persisted to disk):

./redka -p 6380 data.db
redis-benchmark -p 6380 -q -c 10 -n 1000000 -r 10000 -t get,set

SET: 26773.76  requests per second, p50=0.215 msec
GET: 103092.78 requests per second, p50=0.063 msec

So while Redka is 2-5 times slower than Redis (not surprising, since we are comparing a relational database to a key-value data store), it can still do 26K writes/sec and 94K reads/sec, which is pretty good if you ask me.