Premature Optimization ... we all know it. The proxy is now in a state were we can start to optimize the code a bit. After getting some complaints about the performance with keepalive I took a deeper look into the problem and came up with:
- a global script-cache with reload on cache
- less GC-runs
- less overhead per lua-script-call
It is all in SVN now, enjoy it.
To test if we make progress I use mysqlslap in its most basic form:
$ mysqlslap --host=127.0.0.1 --port=4040 \
--create-schema=mysqlslap --iterations=1000 --concurrency=10
which only connects and closes the connection again.
The run-time over 10.000 connects is
proxy, no cache, lua_gc() 11.553s
proxy, cache, lua_gc() 7.065s
proxy, cache, no lua_gc() 6.458s
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