OPTIMIZING - The fastest way to open and show a file

[Ruben Rubio Rey <ruben@xxxxxxxxxxxx>]

Hi,

I m creating a cache system, and i have a problem: PHP takes a lot of 
time opening the file. (Im using 2.6.9-1.667smp and XFS)

* For files less or equal 6 Kb, takes arround 0.02-0.03 miliseconds - its ok
* For files arround 35 Kb takes arround 0.2-0.4 miliseconds - too much.

What can I do to make faster opening files?

**************************************************************
Source code:
  if(file_exists($filename)){
        $modified_date=filemtime($filename);
        if(time()<($modified_date+1 * 24 * 60 * 60)){
            $handle = fopen($filename, "r");
            $contents = fread($handle, filesize($filename));
            fclose($handle);
            echo $contents;
        }
     }
**************************************************************

Thinks that I have tried:
* fopen is *much* faster than include
* filemtime is faster than filectime
* Pear Cache its too much slower (0.5-0.7 milsecond per file)

Thanks in advance
Tk421

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