Bug #77095 [NEW]: slowness regression in 7.2/7.3 (compared to 7.1)
From: remi
Operating system:
PHP version: 7.2.11
Package: PCRE related
Bug Type: Bug
Bug description:slowness regression in 7.2/7.3 (compared to 7.1)
Description:
------------
When pcre.jit=1 everything is ok
With pcre.jit=0 we encounter slowness
From valgrind / kcachegrind results,
99% spent in php_pcre_math_impl (in pcre_exec for 7.2 or php_pcre2_match
for 7.3)
Test script:
---------------
<?php
printf("PHP version %s\n", PHP_VERSION);
printf("pcre.jit=%d\n", ini_get('pcre.jit'));
$fd = __DIR__.'/data';
$a = str_repeat("\n", 1000000);
file_put_contents($fd, $a);
$fi = finfo_open(FILEINFO_NONE);
$t = microtime(true);
var_dump(finfo_file($fi, $fd));
printf("Time = %.4f\n", microtime(true) - $t);
finfo_close($fi);
Expected result:
----------------
PHP version 7.1.24RC1
pcre.jit=1
string(10) "ASCII text"
Time = 0.0147
Actual result:
--------------
PHP version 7.2.12RC1
pcre.jit=1
string(10) "ASCII text"
Time = 0,0172
PHP version 7.2.12RC1
pcre.jit=0
string(10) "ASCII text"
Time = 0,6555
40 times slower
PHP version 7.3.0RC4
pcre.jit=1
string(10) "ASCII text"
Time = 0.0177
PHP version 7.3.0RC4
pcre.jit=0
string(10) "ASCII text"
Time = 2.2364
126 times slower
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Edit bug report at https://bugs.php.net/bug.php?id=77095&edit=1
--
Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=77095&r=trysnapshot54
Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=77095&r=trysnapshot55
Try a snapshot (trunk): https://bugs.php.net/fix.php?id=77095&r=trysnapshottrunk
Fixed in SVN: https://bugs.php.net/fix.php?id=77095&r=fixed
Fixed in release: https://bugs.php.net/fix.php?id=77095&r=alreadyfixed
Need backtrace: https://bugs.php.net/fix.php?id=77095&r=needtrace
Need Reproduce Script: https://bugs.php.net/fix.php?id=77095&r=needscript
Try newer version: https://bugs.php.net/fix.php?id=77095&r=oldversion
Not developer issue: https://bugs.php.net/fix.php?id=77095&r=support
Expected behavior: https://bugs.php.net/fix.php?id=77095&r=notwrong
Not enough info: https://bugs.php.net/fix.php?id=77095&r=notenoughinfo
Submitted twice: https://bugs.php.net/fix.php?id=77095&r=submittedtwice
register_globals: https://bugs.php.net/fix.php?id=77095&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=77095&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=77095&r=dst
IIS Stability: https://bugs.php.net/fix.php?id=77095&r=isapi
Install GNU Sed: https://bugs.php.net/fix.php?id=77095&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=77095&r=float
No Zend Extensions: https://bugs.php.net/fix.php?id=77095&r=nozend
MySQL Configuration Error: https://bugs.php.net/fix.php?id=77095&r=mysqlcfg
Thread (2 messages)
- remi@php.net