#32806 [Asn->Fbk]: fgets() function is slow

ID: 32806 Updated by: wez@php.net Reported By: peoned at yahoo dot com -Status: Assigned +Status: Feedback Bug Type: Performance problem Operating System: Linux PHP Version: 5.0.4 Assigned To: wez New Comment: Can you try your tests with the fwrite() line commented out? Previous Comments: ------------------------------------------------------------------------ [2005-04-28 07:30:31] peoned at yahoo dot com I did an echo strlen($line).","; Here are the lengths for some of the first few lines: 42,7,18,11,71,13,8,7,42,7,20,11,73,70,68,63,13,8,7 It looks pretty much like this for the rest of the file. Lines between 1 and 100 chars in length. Note: It isn't the start up cost for sure because I measured the time just around the while loop with the same results. ------------------------------------------------------------------------ [2005-04-28 04:37:03] wez@php.net How long are the lines in your file? ------------------------------------------------------------------------ [2005-04-28 01:58:55] iliaa@php.net Startup costs could be 8 seconds or more depending on the extensions you are loading. That said PHP's fgets() is still slower then Perl's because of it's implementation that does not wrap the C library fgets() or getline(), but rather uses custom code. ------------------------------------------------------------------------ [2005-04-24 20:20:54] peoned at yahoo dot com I don't agree that this is a bogus bug. You want to tell me that the start up cost is responsible for 8 seconds? Than you have a performance bug with your start up cost. Run it with fread($fin, 1024); where did the start up cost go? Simplifying the script to while($line = fgets($fin)){} doesn't help either. And automatic detection of new lines is disabled. Did you run some of your own tests? ------------------------------------------------------------------------ [2005-04-24 18:25:52] iliaa@php.net Performance is equivalent when you simplify your PHP script and stop timing php's start-up costs. Also make sure that automatic detection of new lines is disabled. ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/32806 -- Edit this bug report at http://bugs.php.net/?id=32806&edit=1