ID: 22721
Updated by: [EMAIL PROTECTED]
-Summary: upgrade from 4.2.2 to 4.3.1 file() takes 10 x longer
Reported By: shawn at rumental dot com
-Status: Open
+Status: Assigned
Bug Type: Performance problem
Operating System: win2k
PHP Version: 4.3.1
-Assigned To:
+Assigned To: wez
New Comment:
Too many reallocs makes for a slow file() implementation.
PHP5 will have much better performance here under windows with the new
memory mapping support (and will actually have *faster* performance).
I am working on a fix for 4.3.x now.
Previous Comments:
------------------------------------------------------------------------
[2003-03-18 06:53:56] shawn at rumental dot com
typo - "USING 4.3.1 should be USING 4.2.2"
my bad
------------------------------------------------------------------------
[2003-03-17 22:11:57] shawn at rumental dot com
EXAMPLE CODE
-------------------------------------------
set_time_limit ('200');
# logfile is 4mb text file with 17370 LINES
$file="test.log";
$times=10;
$i=1;
while($i <=$times){
$mt = explode(' ', microtime()); $script_start_time = $mt[0] + $mt[1];
file($file);
$mt = explode(' ', microtime()); $script_end_time = $mt[0] + $mt[1];
$time[]=round($script_end_time - $script_start_time, 5);
echo 'file loaded in ', round($script_end_time - $script_start_time,
5), ' seconds<br>';
$i++;
}
$average=array_sum($time)/$times;
echo "average time - ".$average;
---------------------------------------------------
RESULTS:
USING 4.3.1
------------
file loaded in 0.47855 seconds
file loaded in 0.74892 seconds
file loaded in 0.7595 seconds
file loaded in 0.58205 seconds
file loaded in 0.82617 seconds
file loaded in 0.83293 seconds
file loaded in 0.86725 seconds
file loaded in 0.90333 seconds
file loaded in 0.63803 seconds
file loaded in 0.82538 seconds
average time - 0.746211
LATEST STABLE
--------------
file loaded in 16.18174 seconds
file loaded in 16.88304 seconds
file loaded in 16.68356 seconds
file loaded in 16.49004 seconds
file loaded in 16.42378 seconds
file loaded in 16.5862 seconds
file loaded in 16.80012 seconds
file loaded in 16.13519 seconds
file loaded in 25.35214 seconds
file loaded in 32.71799 seconds
average time - 19.02538
results are similar even with smaller files
------------------------------------------------------------------------
[2003-03-17 09:45:43] [EMAIL PROTECTED]
Please try using this CVS snapshot:
http://snaps.php.net/php4-STABLE-latest.tar.gz
For Windows:
http://snaps.php.net/win32/php4-win32-STABLE-latest.zip
Also, add a short but complete example script here which
can be used to reprodude this problem.
------------------------------------------------------------------------
[2003-03-17 08:32:46] shawn at rumental dot com
changed summary - reopened
------------------------------------------------------------------------
[2003-03-17 08:31:35] shawn at rumental dot com
in version 4.3.1 file() seems to be extremly slow 10-100x as slow. a
serious performance issue.
http://bugs.php.net/bug.php?id=19971
also refers to this problem but has been closed with incorrect
information it seems.
------------------------------------------------------------------------
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/22721
--
Edit this bug report at http://bugs.php.net/?id=22721&edit=1
