On Dec 3, 2007, at 9:16 PM, Gregory Beaver wrote:
Brian Shire wrote:
On Dec 3, 2007, at 2:17 PM, Stanislav Malyshev wrote:
I am a developer on a CMS also which uses the auto-include
functionality to
include many classes over many files. Each request can include
up to 30
different files. The speed increase is around the 15% mark when
combining
the files. This is with APC installed too.
Can you provide some benchmark setups that this could be
researched -
i.e. describe what was benchmarked and how to reproduce it?
I've seen this come up before internally at Facebook. Many people
do a
microtime() test within there code and consider this a definitive
benchmark of how fast there script runs. Unfortunately this
excludes a
lot of work that's done prior to execution. Typically we see people
claiming gains from combining files when in actuality they where just
excluding the compilation time in their benchmark by moving
compilation
done via includes() to before the initial script begins
executing. When
measuring this type of optimization one really must measure
outside of
PHP using something like an Apache Bench tool so you get an idea
of the
big picture. I think trying to optimize these also presumes that
you're
already running a bytecode cache etc.
Hi Brian and Stas,
I hate to say it, but it is somewhat condescending to assume that the
benchmarks were done with microtime(). I spent about 15 hours of my
time designing a very complex, carefully constructed benchmark, and
yes,
I ran it with apache benchmark. In addition, I ran the benchmark
using
no APC, with APC, and with APC and apc.stat=0. The benchmark in
question compared require_once to include with full paths to a single
file. In the best case, I got a 12% performance difference between
include with full paths and apc.stat=0 and a single file.
Hi Greg,
I'm sorry that my message probably did come off as condescending. :-
( I really just wanted to share some my *own* pitfalls in case it
was something that might be helpful here.
If you aren't too put off and you are running APC then perhaps we can
discuss more off-list as some of our performance problems may be
similar and I could exchange some optimizations with you to try out.
Again *extremely* sorry for insulting you or anyone else here with my
not so well thought out email, I'd just like to try to help out a bit.
-shire
--
PHP Internals - PHP Runtime Development Mailing List
To unsubscribe, visit: http://www.php.net/unsub.php
