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run code in 150+ php & hhvm versions
Bugs & Features
<?php function benchmarkMemory(callable $function, $args=null) { declare(ticks=1); $memory = memory_get_usage(); $max = 0; if(!class_exists('classWithNoName')) { class classWithNoName { public static $memory, $max; public function __invoke() { self::$memory = memory_get_usage() - self::$memory; self::$max = self::$memory>self::$max?self::$memory:self::$max; self::$memory = memory_get_usage(); } public function __toString() { return __CLASS__; } } classWithNoName::$memory = memory_get_usage(); classWithNoName::$max = 0; } register_tick_function('classWithNoName'); $result = is_array($args)? call_user_func_array($function, $args): call_user_func_array($function); unregister_tick_function('classWithNoName'); return [ 'memory' => $max ]; } var_dump(benchmarkMemory('str_repeat', ['test',1E4]));//0 var_dump(benchmarkMemory('str_repeat', ['test',1E3]));//0
Output for 5.4.0 - 5.6.28, 7.0.0 - 7.1.0
Warning: register_tick_function(): Invalid tick callback 'classWithNoName' passed in /in/TelNe on line 28 array(1) { ["memory"]=> int(0) } Warning: register_tick_function(): Invalid tick callback 'classWithNoName' passed in /in/TelNe on line 28 array(1) { ["memory"]=> int(0) }
Output for hhvm-3.10.0 - 3.12.0
Fatal error: Call to undefined function register_tick_function() in /in/TelNe on line 28
Process exited with code 255.
Output for 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/TelNe on line 33
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/TelNe on line 33
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting ')' in /in/TelNe on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting ')' in /in/TelNe on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/TelNe on line 3
Process exited with code 255.