Re: regular expressions: HUGE speed differences

PIII 400MHz, 512Mb, SuSe 6.4, 2.2.14 smp, php 3.0.16, Completed in 0.76187908649445 seconds PIII 350MHz, 256Mb, Suse 7.3, 2.4.9, php 4.0.6, Completed in 2.6342689990997 seconds File Size:28537kb, But for "real tests", send the original file you use direct BTW How the hell did you develop this monstrous eregi? For better maintenance, I´d cut it in several pieces, or first make the inputfile smaller using grep " a href" > to test.file , This will reduce fileaccess a lot, and takes microseconds to proceed. Oliver At 06.04.2002 15:01, you wrote:

Im using a regular expression, to get all urls from a file. When using it on the webserver, it processes a 25kb html file about 0.25 seconds (PIII 350, 128mb ram, linux 2.2.13-7mdk, php 3.0.12). When i try the same on my machine (Celeron 300A, 192mb ram.), it does it about 14-17 seconds, which is about 60-70 times slower. Tested it on: redhat 7.2, php 4.1.1 - 16 seconds windows 98, php 4.1.1 - 14 seconds windows 98, php 3.0.12 - 17 seconds. The machine speed differences arent that big, especially considering that other(simpler) regexps run at the almost the same speed (20-30% difference). Where can this enourmous speed difference come from <snip>

Anyone care to test it on there machine? Full code (20 lines) with

timing function would be: <? function getmicrotime(){

    list($usec, $sec) = explode(" ",microtime());
    return ((float)$usec + (float)$sec);
    }

//change to some html file around 25kb in size $lines = @file('test.html'); if (is_array($lines))

    {
    while (list($id,$line) = each($lines))
           $file .= $line;

} $start_time=getmicrotime(); while (eregi("(<frame[^>]*src[[:blank:]]*=|href[[:blank:]]*=|http-equiv=['\"]refresh['\"] *content=['\"][0-9]+;url[[:blank:]]*=|window[.]location[[:blank:]]*=|window[.]open[[:blank:]]*[(])[[:blank:]]*[\'\"]?(([[a-z]{3,5}://(([.a-zA-Z0-9-])+(:[0-9]+)*))*([:%/?=&;\\,._a-zA-Z0-9-]*))(#[.a-zA-Z0-9-]*)?[\'\" ]?",$file,$regexp)) { print $regexp[2]."\n"; $file=str_replace($regexp[0], "", $file); } $end_time = getmicrotime()- $start_time; print "Completed in ".$end_time." seconds"; ?>