Result
Unfortunately, no history for this test is available.
Code
The first test, "callback", was:
if ($GLOBALS['dummy'] === 41) $cb = 'do_something1'; else $cb = 'do_something2'; $cb();
The second test, "wrapped", was:
/*
function do_something($type)
{
if ($type === 'do_something1')
do_something1();
else
do_something2();
}
*/
if ($GLOBALS['dummy'] == 41)
$cb = 'do_something1';
else
$cb = 'do_something2';
do_something($cb);