# __autoload() performance

- Thread: https://externals.io/message/9644
- Original archive: https://news-web.php.net/php.internals/9644
- Started by David Chen on 2004-05-04T04:27:57+00:00
- Messages: 1
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## #9644 — David Chen — 2004-05-04T04:27:57+00:00

URL: https://externals.io/message/9644#9644

Hi,

It seems that for PHP5 to simply call __autoload() requires a massive .0040
seconds. Considering that each hit takes at least 30 classes, that's already
a tenth of a second gone on simply calling __autoload()! Why is it so slow?

My implementation should be extremely fast:
$LOCATION_TABLE=array();$LOCATION_TABLE['stdlib_phpvars_env']='c:/inetpub/ww
wroot/transOutput/web app/stdlib/phpVars/Env.php';
//~50 more lines like this here
$LOCATION_TABLE['test_stringtest']='c:/inetpub/wwwroot/transOutput/web
app/test/StringTest.php';

function __autoload ($n) {
global $autotracker; /*$n=strtolower($n);*/
if ($autotracker==$n)die("Attempting to autoload $n again");
$autotracker=$n;
if(!empty($GLOBALS['LOCATION_TABLE'][$n]))include_once($GLOBALS['LOCATION_TA
BLE'][$n]);}


Xdebug output:
TRACE START [2004-05-02 21:40:16]
    0.0373          0     -> test_test->test_test()
C:\Inetpub\wwwroot\transOutput\Web app\test\Test.php:55
    0.0376          0       -> `func_get_args()`
C:\Inetpub\wwwroot\transOutput\Web app\test\Test.php:52
    0.0377          0       -> test_test->initStatictest()
C:\Inetpub\wwwroot\transOutput\Web app\test\Test.php:52
    0.0379          0     -> test_test->main()
C:\Inetpub\wwwroot\transOutput\Web app\test\Test.php:55
    0.0382          0       -> __autoload()
C:\Inetpub\wwwroot\transOutput\Web app\test\Test.php:16
    0.0417          0         ->
include_once(c:\Inetpub\wwwroot\transOutput\Web
app\persistent\PropertyCriteria.php) C:\Inetpub\wwwroot\transOutput\Web
app\typeCheck.php:81
    0.0419          0       ->
persistent_propertycriteria->persistent_propertycriteria()

So it looks like calling include_once() only takes .0002 seconds but getting
there in __autoload takes a massive .0040 seconds! Is this correct behavior?
What can I do to speed it up?
Thanks.
David Chen