ID:               40363
 User updated by:  r dot craig at chester dot ac dot uk
 Reported By:      r dot craig at chester dot ac dot uk
-Status:           Bogus
+Status:           Open
 Bug Type:         Performance problem
 Operating System: Linux 2.6.5-7.282-bigsmp
 PHP Version:      5.2.0
 New Comment:

If I remove the strtotime() and just have the 4000 element array, it
also works faster. 

If I just remove the _assignment_ from the return_some_stuff() if also
works much faster.

But this is a sumation of a live peice of code. I want to make a 4000
array and then call strtotime 3000 times times (Is this so Odd?). This
is 10 times slower in 5.2.0 and uses 30 times as much memory.

If I take out all the code and just have "echo 'Hello World'", It's
also much faster, but that's not quite what I want to do!


Previous Comments:
------------------------------------------------------------------------

[2007-02-05 16:05:09] [EMAIL PROTECTED]

If you remove the 4000-elements array, 5.2.0 works 3x-4x times faster
than 5.1.6.

------------------------------------------------------------------------

[2007-02-05 15:35:53] r dot craig at chester dot ac dot uk

derick, but how does that compare to 5.1.6?

The memory increase during the strtotime() loop, I see is with no
php.ini (php -c /dev/null). 

E_STRICT gives me warnings on both 5.2 and 5.1.6, "strtotime(): It is
not safe to rely on the system's timezone settings... " etc.

Is it perhaps something to do with logging this warning? I thought if
strict was turned off it didn't log the error at all.

------------------------------------------------------------------------

[2007-02-05 14:36:09] [EMAIL PROTECTED]

Works fine for me, do you have error_Reporting set to E_ALL | E_STRICT
?

MEM 0.07MB (0.09MB)

MEM 0.85MB (2.35MB)

Total Time: 1.058070898056 ms (4) , avergage: 0.26451772451401<br/>

MEM 0.85MB (2.35MB)




------------------------------------------------------------------------

[2007-02-05 14:29:42] r dot craig at chester dot ac dot uk

Description:
------------
Performance of the attached script is 10 times slower and uses 30 times
as much memory as it does on PHP 5.1.6.

I am not sure if it is strtotime(), this is where I first noticed the
problem. And if i take out the strtotime(), it is fine. However
strtotime() does not in itself take any longer.

Configure Command =>  './configure' '--with-freetype'
'--with-apxs2=/usr/sbin/apxs2' '--with-mssql' '--with-gettext'
'--with-ldap' '--with-pspell' '--enable-s
hared' '--with-jpeg-dir=/usr' '--enable-gd-native--ttf' '--with-zlib'
'--enable-magic-quotes' '--with-openssl' '--with-mysqli' '--with-mysql'
'--enable-memory
-limit' '--with-tidy=/usr/src/tidy'
'--with-config-file-path=/usr/local/Zend/etc/' '--enable-soap'
Server API => Command Line Interface


Reproduce code:
---------------
<?php

print_mem();
$t= return_some_stuff(); /** remove the assignment this is fine
performance wise, but still uses memory */

$start = microtime(true); $count =4;

print_mem();

for($i=0; $i<$count; $i++) test1();

$diff = microtime(true) - $start;
echo "Total Time: $diff ms ($count) , avergage: " .($diff/$count) . 
"<br/>\n\n"; print_mem();

function test1(){
        for($i=0; $i<3000; $i++){
            strtotime ('2005-09-01');
  /** if i take out the strtotime, or change it to microtime() or some
other NDF, performance is fine */
        }
}
function return_some_stuff () {
        for($i=0; $i<4000; $i++){
        $x[$i]["FOOBARFOOBAR"]="FOOBAR";
    }

        foreach ($x as $tmp) {
        $element[] = $tmp['FOOBARFOOBAR'];
        }
        return $element;
}

function print_mem(){
        $mem = memory_get_usage();
        $mem_peak = function_exists('memory_get_peak_usage')?
memory_get_peak_usage():$mem;
        printf("MEM %.2fMB (%.2fMB)\n\n", $mem/1024/1024,
$mem_peak/1024/1024 ); }
?>


Expected result:
----------------
(As on PHP 5.1.6)

MEM 0.06MB (0.06MB)

MEM 0.31MB (0.31MB)

Total Time: 0.24065089225769 ms (4) , average: 0.060162723064423

MEM 0.31MB (0.31MB)


Actual result:
--------------
On php 5.2.0 

MEM 0.06MB (0.06MB)

MEM 0.39MB (1.19MB)

Total Time: 2.4987750053406 ms (4) , average: 0.62469375133514<br/>

MEM 9.23MB (9.23MB)



------------------------------------------------------------------------


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