Bug #13860 Updated: Bzip2 bzdecompress function is wery slow...

ID: 13860 User updated by: mcdouglas@angelfire.com Reported By: mcdouglas@angelfire.com Status: Open Bug Type: Bzip2 Related Operating System: Windows 98 SE PHP Version: 4.0.6 New Comment: bzdecompress($ecd_cont,1); I'm used it without the 1 parameter, i'm just tryed uot what happen if i use it... Previous Comments: ------------------------------------------------------------------------ [2001-10-28 15:34:18] mcdouglas@angelfire.com I made a little decompresser script: <?php $efilename = "d:/pic.bz2"; //A compressed jpg image ( original size: 388kbyte, packed size: 388kbyte) $ufilename2 = "d:/pic.jpg"; $fp = fopen($efilename, "rb"); $ecd_cont = fread($fp, filesize($efilename)); //read the compressed data from file fclose($fp); $fp = fopen($ufilename2,"wb"); $ecd_cont = bzdecompress($ecd_cont,1); //decompress the readed compressed data fwrite($fp, $ecd_cont); //write the decompressed data into file fclose($fp); echo "<img src=\"file://d:\\pic.jpg\">"; ?> Ok, this is work... But it is WERY WERY slow!!! It's take 60sec to display the decompressed image, why?? I made the decompression befor with an other method: <?php $efilename = "d:/pic.bz2"; $ufilename2 = "d:/pic.jpg"; $bz = bzopen($efilename, "rb"); $ecd_cont = bzread($bz, 400000); // See below bzlose($bz); $fp = fopen($ufilename2,"wb"); fwrite($fp, $ecd_cont); fclose($fp); echo "<img src=\"file://d:\\pic.jpg\">"; ?> Ok this is working (And this is fast! The decompressed picture appears immediately), but there is a little problem: In the PHP manual I read this about the bzread() function: "If the optional parameter length is not specified, bzread() will read 1024 (uncompressed) bytes at a time." Ok, so it will read 1024 uncompressed bytes from my compressed file, if I not give the lenght parameter (as I did in the example). But there is a problem: if I want to be precise then I must give the lenght of the original file, but how??? I only have the compressed file, which is not equal with the original (ok, in my example it is, but only because the original jpg-compressed file), so I cant use the filesize() function, because it gave only the compressed filesize, neither the strlen() because I havnt got a string yet :) And I think you agree with me if I dont want to write 400Mbyte to parameter... this is not a correct solution. I think the correct solution if the bzread() function is read the entire file if I dont give the lenght parameter. ------------------------------------------------------------------------ Edit this bug report at http://bugs.php.net/?id=13860&edit=1