I'm genuinely curious... is the impact on performance remotely concerning when using `count($arr)` over and over in a loop, vs. storing the count first, and then iterating?

In other words, does this:

```
$count = count($arr);
for($i = 0; $i < $count; $i++) { ... }

```

Perform any better than this:

```
for($i = 0; $i < count($arr); $i++) { ... }

```

I have never noticed a performance issue, but my arrays are usually relatively small (maybe a few hundred items at most). But for very large arrays, does it make a difference whether you store the count before iterating or re-calculate the count every time the loop runs?