Hi,
I had a discussion recently about the performance of the component's autoload
infrastructure. I did a little profiling and found some places to speed the
autoload process.
I don't copy the numbers here, as you get a better picture by looking at
kcachegrind on your own. You can use the following short script:
require "your/path/to/Base/src/base.php";
function __autoload( $className )
{
ezcBase::autoload( $className );
}
echo ezcArchiveV7Tar::TAR;
echo ezcConsoleInput::TYPE_NONE;
The following things could be optimized IMHO:
* ezcBase::setPackageDir is called for every __autoload() which is unnecessary
and expensive
* This hack in ezcBase::autoload() doesn't use preg_match and therefore is
faster but also more ugly:
$fileNames = array();
$prefix = substr( $className, 0, strspn(
$className, 'abcdefghijklmnopqrstuvwxyz') );
$trimmedClassName = trim(
$className, 'abcdefghijklmnopqrstuvwxyz0123456789' );
$firstWordLength =strspn(
$trimmedClassName, 'abcdefghijklmnopqrstuvwxyz0123456789', 1 )+1;
$firstWord = substr( $trimmedClassName, 0, $firstWordLength);
$firstWord[0] = strtolower( $firstWord[0] );
$secondWord = substr( $trimmedClassName,
$firstWordLength,
strspn(
$trimmedClassName,
'abcdefghijklmnopqrstuvwxyz0123456789',
$firstWordLength+1)+1 );
$secondWord[0] = strtolower( $secondWord[0] );
if( $secondWord !== "" && ezcBase::requireFile( $fileNames[] =
$firstWord.'_'.$secondWord.'_autoload.php', $className, $prefix ) )
{
return true;
}
if( ezcBase::requireFile( $fileNames[] = $firstWord.'_autoload.php',
$className, $prefix ) )
{
return true;
}
if( ezcBase::requireFile( $fileNames[] = 'autoload.php', $className,
$firstWord ) )
{
return true;
}
* In ezcBase::requireFile you first check the existence of the autoload-array
file with file_exists and afterwards require it.
The file_exists is nearly as slow as a preg_match. You could do do the
following instead:
if ( $prefix === 'ezc'
&& is_array( $array = @include "$autoloadDir$fileName" )
&& array_key_exists( $className, $array ) )
{
// Add the array to the cache, and include the requested file.
ezcBase::$autoloadArray = array_merge( ezcBase::$autoloadArray,
$array );
* There's another file_exists to eliminate in loadFile().
Instead of changing the current ezcBase, you could add a second base.php file
to Base which is optimized for speed and doesn't do so much
checking. In the application I can simply switch between the two ezcBase
classes.
Cheers,
Thomas Koch
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