Alexey Verkhovsky wrote:
BASELINE (MRI / Mongrel / native MySQL driver / DB sessions)
logging enabled: 89 req/sec
logging disabled: 92 req/sec

BASELINE JRUBY (JRuby / Mongrel / Ruby MySQL driver / DB sessions)
logging enabled: 21 req/sec
logging disabled: 32 req/sec

JETTY (ObjectSpace enabled)
logging enabled: 23 req/sec
logging disabled  30 req/sec

JETTY (ObjectSpace disabled)
logging enabled: 29 req/sec
logging disabled: 45 req/sec (!)

Hey, not bad...certainly getting there. I agree with (!)...45s is comfortable at 50% perf, and stunningly faster than with logging enabled. Pretty miserable IO performance there. It's likely that similar IO bottlenecks exist for sockets, which would certainly explain to some extent overall poor performance.

- Charlie

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