Bug #70613 [Opn]: PHP7 degraded performance

Edit report at https://bugs.php.net/bug.php?id=70613&edit=1 ID: 70613 User updated by: daniel at theenginuity dot com Reported by: daniel at theenginuity dot com Summary: PHP7 degraded performance Status: Open Type: Bug Package: Performance problem Operating System: Ubuntu 14.04 x86_64 PHP Version: 7.0.0RC4 Block user comment: N Private report: N New Comment: I started with a real-world application but wanted to isolate it down to a simple script that would help with reproducing the results. I have conducted more performance tests, this time using a standard install of Wordpress 4.3.1 Results: PHP 5.6.14 Average Memory Usage (Start of Test) = 33.9 MB PHP 5.6.14 Average Memory Usage (End of Test) = 152.3 MB PHP 5.6.14 Request Per Second (3 Test Runs) = 13.93, 13.87, 13.84 PHP 7.0 RC4 Average Memory Usage (Start of Test) = 9.4 MB PHP 7.0 RC4 Average Memory Usage (End of Test) = 321.0 MB PHP 7.0 RC4 Request Per Second (3 Test Runs) = 7.06, 7.22, 7.21 Previous Comments: ------------------------------------------------------------------------ [2015-10-13 16:10:23] rasmus@php.net I am not sure why you care about the performance of a trivial script like that. Install a real app and test. If you still see a performance problem with something real, let us know. ------------------------------------------------------------------------ [2015-10-13 15:40:39] daniel at theenginuity dot com Executed new performance tests with latest versions of PHP and observed the following results: PHP 5.6.14 Average Memory Usage (Start of Test) = 33.9 MB PHP 5.6.14 Average Memory Usage (End of Test) = 36.3 MB PHP 5.6.14 Request Per Second (3 Test Runs) = 1043, 1039, 1034 PHP 7.0 RC3 Average Memory Usage (Start of Test) = 9.6 MB PHP 7.0 RC3 Average Memory Usage (End of Test) = 17.1 MB PHP 7.0 RC3 Request Per Second (3 Test Runs) = 959, 904, 939 PHP 7.0 RC4 Average Memory Usage (Start of Test) = 9.4 MB PHP 7.0 RC4 Average Memory Usage (End of Test) = 17.0 MB PHP 7.0 RC4 Request Per Second (3 Test Runs) = 971, 974, 974 ------------------------------------------------------------------------ [2015-10-02 13:51:00] daniel at theenginuity dot com Updated bug to RC3, will compile RC4 and will verify if any changes are observed in performance. I can help debug this further if anyone would like more detailed information? ------------------------------------------------------------------------ [2015-10-02 11:37:59] kalle@php.net Have you tried out RC4? (PHP version says RC4 in the bug report, but comments state RC3, so just wondering) ------------------------------------------------------------------------ [2015-10-02 04:49:32] daniel at theenginuity dot com Re-verified Opcache settings in PHP 7.0 RC3, fixed missing opcache.revalidate_freq, all other settings set to same values as posted. Request per second for PHP 7.0 = 1245, 1204, 1211 ------------------------------------------------------------------------ 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 https://bugs.php.net/bug.php?id=70613 -- Edit this bug report at https://bugs.php.net/bug.php?id=70613&edit=1