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run code in 150+ php & hhvm versions
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<?php class Benchmark { private static $max, $memory; public static function memoryTick() { self::$memory = memory_get_usage() - self::$memory; self::$max = self::$memory>self::$max?self::$memory:self::$max; self::$memory = memory_get_usage(); } public static function benchmarkMemory(callable $function, $args=null) { declare(ticks=1); self::$memory = memory_get_usage(); self::$max = 0; register_tick_function('call_user_func_array', ['Benchmark', 'memoryTick'], []); $result = is_array($args)? call_user_func_array($function, $args): call_user_func_array($function); unregister_tick_function('call_user_func_array'); return [ 'memory' => self::$max ]; } } var_dump(Benchmark::benchmarkMemory('str_repeat', ['test',1E4])); var_dump(Benchmark::benchmarkMemory('str_repeat', ['test',1E3]));
Output for 7.0.0 - 7.1.0
array(1) { ["memory"]=> int(40960) } array(1) { ["memory"]=> int(4096) }
Output for hhvm-3.12.0
Fatal error: Uncaught Error: Call to undefined function register_tick_function() in /in/AaDUv:19 Stack trace: #0 /in/AaDUv(29): Benchmark::benchmarkMemory() #1 {main}
Process exited with code 255.
Output for hhvm-3.10.0
Fatal error: Call to undefined function register_tick_function() in /in/AaDUv on line 19
Process exited with code 255.
Output for 5.4.0 - 5.6.28
array(1) { ["memory"]=> int(40120) } array(1) { ["memory"]=> int(4120) }
Output for 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/AaDUv on line 19
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/AaDUv on line 19
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/AaDUv on line 4
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 T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/AaDUv on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/AaDUv on line 4
Process exited with code 255.