Result
Unfortunately, no history for this test is available.
Code
The first test, "create_function()", was:
$a = $GLOBALS['a']; for($i = 0; $i < 100; ++$i) { $callback = create_function('$n', 'return $n;'); array_map($callback, $a); }
The second test, "lambda", was:
$a = $GLOBALS['a']; for($i = 0; $i < 100; ++$i) { $callback2 = function($n) { return $n; }; array_map($callback2, $a); }