PHP generates millions of UID deposit files

This is one of the questions asked in a group today, mainly the time spent writing files is large.

I do an experiment here, every 20,000 uid write a file, about a file write is about 280kb, so that the overall write time only 13S

Paste the code

    
     set_time_limit(0);$starttime = time();$fh = fopen($filename,'w');for($i=0;$i<1000000;$i++){    $uid = uniqid();    if($i%20000 == 0)     {        $filename = $i.'.txt';    }    fwrite($fh,$uid.' ');}$endtime = time();echo'总用时:'.($endtime-$starttime).'s';?>

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The above describes the PHP generation of the million UID deposit file, including the content, I hope that the PHP tutorial interested in a friend to help.

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