Online PHP editor | output for AaDUv

@ 2013-11-14T11:26:14Z

<?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 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.26, 7.3.0 - 7.3.13, 7.4.0 - 7.4.1: array(1) { ["memory"]=> int(40960) } array(1) { ["memory"]=> int(4096) }
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40: array(1) { ["memory"]=> int(40120) } array(1) { ["memory"]=> int(4120) }
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 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 - 4.3.11, 4.4.0 - 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.

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