Hello,
array_shift() currently reindexes the array after shifting one element.
The reindexing has quite some impact on it's performance. I would like
to suggest an extra parameter to array_shift() which can be used to
prevent reindexing.
From a few quick (and sloppy!) tests I get these results:
`reset($array); list($key, $value) = each($array);
unset($array[$key]);` is ~50-150 times faster than array_shift().
Calling array_reverse() and using array_pop() is ~2000-5000 times faster.
If you agree this would be an useful addition I will create a patch.
-- Jille
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