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- Subject: Re: Understanding 'perf report' result lua 5.2.3: __memcpy_sse2_unaligned ?
- From: Roberto Ierusalimschy <roberto@...>
- Date: Tue, 9 Dec 2014 12:36:01 -0200
> What is it happening that triggers that many '__memcpy_sse2_unaligned' ?
> Can anyone shed some light on this ?
If I understood the report correctly, there is no indication that there
are too many '__memcpy_sse2_unaligned'; it is big only in comparison
with the rest. If all your server does is to move data around (e.g.,
it reads it from somewhere, creates a Lua string with it, and then writes
it somewhere else), it seems reasonable that memcpy will have a big
share of the total time.