note 103787 added to function.imagepng

If you care about speed, you probably already cache your generated images to a file. In that case, DON'T use "createimagefrompng" and "imagepng" to output the image. Use fpassthru instead. It is literally hundreds of times faster. <?php header("Content-Type: image/png"); # Generate cachefile for image, if it doesn't exist if( !file_exists($cachefile) ) { $im = generateimage(); # some code generates an image resource imagepng($im, $cachefile); # store the image to cachefile # don't output it like this: /* imagepng($im);*/ imagedestroy($im); } $fp = fopen($cachefile, 'rb'); # stream the image directly from the cachefile fpassthru($fp); exit; ?> I've tested it with a 5120x5120 (1.2Mb) image, that was cached on the harddisk. Using imagepng, the transfer took 12 seconds. Using fpassthru, it took only 32ms! ---- Server IP: 91.199.167.223 Probable Submitter: 145.53.45.17 ---- Manual Page -- http://www.php.net/manual/en/function.imagepng.php Edit -- https://master.php.net/note/edit/103787 Del: integrated -- https://master.php.net/note/delete/103787/integrated Del: useless -- https://master.php.net/note/delete/103787/useless Del: bad code -- https://master.php.net/note/delete/103787/bad+code Del: spam -- https://master.php.net/note/delete/103787/spam Del: non-english -- https://master.php.net/note/delete/103787/non-english Del: in docs -- https://master.php.net/note/delete/103787/in+docs Del: other reasons-- https://master.php.net/note/delete/103787 Reject -- https://master.php.net/note/reject/103787 Search -- https://master.php.net/manage/user-notes.php