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Date: Thu, 17 Jul 2008 09:49:38 +0300
To: "Rasmus Lerdorf" <rasmus@lerdorf.com>
Cc: "Amir Hardon" <amirh@metacafe.com>, "Oleg Grenrus" <phadej@gmail.com>, 
	"PHP Internals List" <internals@lists.php.net>
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Subject: Re: [PHP-DEV] lstat call on each directory level
From: arvids.godjuks@gmail.com ("Arvids Godjuks")

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Yesterday I made some tests on my site with strace to see how much lstat I
have and how can I optimize them. Well, I managed to get rid of them almost
at all, but now I have some questions about include_path and including files
based on current dir.

I have such structire of files

/home/file/www (that's my site root dir)

include/
- bittorrent
- global.php

lang/
- eng.lang
- rus.lang

index.php


My files are
---- index.php ---
require './include/bittorrent.php';

--- common.php ---
require './include/global.php';
require './lang/eng.lang';
And some other files from include dir

Default include path is ".:/usr/share/php5:/usr/share/php" and if I don't
change it it results in a bunch of lstat. Here is the trace
http://pastebin.com/m37704b6a

The thing I don't understand from trace is WHY it tests include path BEFORE
the ./ ? Why it doesn't try to load file based on relative path first (it
should hit it on first try) and then use include path?
Ok, I make in bittorrent.php - set_include_path('/home/file/www');

The only lstat i have now is

lstat("/home", {st_mode=S_IFDIR|0755, st_size=144, ...}) = 0
lstat("/home/file", {st_mode=S_IFDIR|0755, st_size=1112, ...}) = 0
lstat("/home/file/www", {st_mode=S_IFDIR|0755, st_size=11880, ...}) = 0
lstat("/home/file/www/bittorrent.php", 0x7fff8d95cca0) = -1 ENOENT (No such
file or directory)
open("/home/file/www/bittorrent.php", O_RDONLY) = -1 ENOENT (No such file or
directory)
open("/home/file/www/include/bittorrent.php", O_RDONLY) = 14

So the question is - why are they happen at all, if I include bittorrent.php
as require './include/bittorrent.php' in index.php. As i understand it
should hit the right folder from first time. Could you, please, explain how
all this works, because as it turned out it is not so obvious as it should
be...

I have PHP 5.2.6 (Gentoo Linux package name is dev-php5/php-5.2.6-r2) and
lighttpd 1.5

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