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.
-shire
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