Bug #73678 [Opn]: Strange performance degradation

Edit report at https://bugs.php.net/bug.php?id=73678&edit=1 ID: 73678 Updated by: ab@php.net Reported by: riggsfolly at gmail dot com Summary: Strange performance degradation Status: Open Type: Bug Package: Performance problem Operating System: Windows PHP Version: 7.1.0 Block user comment: N Private report: N New Comment: Same here, degradation of 7.0, neither with 7.1 or master. Thanks. Previous Comments: ------------------------------------------------------------------------ [2016-12-07 20:06:15] nikic@php.net Cannot reproduce. Ubuntu: PHP 7.0: nikic@saturn:~/php-7.0-fast$ sapi/cli/php -n t007.php Using (object) [] method 10000000 times 0.77149391174316 Using new stdClass() method 10000000 times 1.3405849933624 PHP 7.1: Using (object) [] method 10000000 times 0.71639490127563 Using new stdClass() method 10000000 times 1.1726460456848 Windows (x64 nts): PHP 7.0: Using (object) [] method 10000000 times 1.0753118991852 Using new stdClass() method 10000000 times 1.6590139865875 PHP 7.1: Using (object) [] method 10000000 times 0.99693298339844 Using new stdClass() method 10000000 times 1.4866938591003 Please make sure that you do not have XDebug enabled. ------------------------------------------------------------------------ [2016-12-07 19:39:42] riggsfolly at gmail dot com Description: ------------ I was using this script to benchmark a question on StackOverflow and I noticed that in PHP 7.1.0 the creation of a stdClass() object increased in time taken by an appreciable amount between PHP7.0.13 and PHP7.1.0 This seemed rather odd based on all the speed improvment work done in 7.0 and 7.1 so I thought I would report it, in case it pointed someone at something that may have changed in 7.1 to the damage a speed improvement. Results for different versions of PHP PHP7.1.0 Using (object) [] method 10,000,000 times 22.970033168793 Using new stdClass() method 10,000,000 times 38.114390850067 Difference (-ve) means (object) [] is quicker -15.144357681274 PHP7.0.13 Using (object) [] method 10,000,000 times 22.230031967163 Using new stdClass() method 10,000,000 times 29.300040960312 Difference (-ve) means (object) [] is quicker -7.0700089931488 PHP5.6.25 Using (object) [] method 10,000,000 times 47.920066833496 Using new stdClass() method 10,000,000 times 54.20007610321 Difference (-ve) means (object) [] is quicker -6.2800092697144 PHP5.5.36 Using (object) [] method 10,000,000 times 46.450064897537 Using new stdClass() method 10,000,000 times 53.110074043274 Difference (-ve) means (object) [] is quicker -6.6600091457367 Test script: --------------- function one() { $obj = (object) ['prop1' => 1, 'prop2' => 2]; return $obj; } function two() { $obj = new stdClass(); $obj->prop1 = 1; $obj->prop2 = 2; return $obj; } $looper = 10000000; $a = microtime(1); for ( $i=0; $i < $looper; $i++) { $x = one(); } $b = microtime(1); $c = $b-$a; echo "Using (object) [] method $looper times " . $c . PHP_EOL; $a = microtime(1); for ( $i=0; $i < $looper; $i++) { $x = two(); } $b = microtime(1); $d = $b-$a; echo "Using new stdClass() method $looper times " . $d . PHP_EOL; echo 'Difference (-ve) means (object) [] is quicker ' . ($c - $d) . PHP_EOL; ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=73678&edit=1