Based on the answers to another mine question (this: [How to make children auto fit parent's width only with CSS?](https://stackoverflow.com/questions/5858108/how-to-make-children-auto-fit-parents-width-only-with-css)), I'm thinking which is the best jQuery approach to solve the problem regarding performance.

*Block 1: find all DOM elements when needed:*

```
$("div.parent a").css("width", $("div.parent").width() / $("div.parent a").length - 2);

```

*Block 2: find only DOM children, use each(), parent() and siblings():*

```
$("div.parent a").each(function() {
    $(this).css("width", $(this).parent().width() / $(this).siblings().length - 2);
});

```

*Block 3: find DOM parent first, use each() and find children based on context:*

```
$("div.parent").each(function() {
    $("a", this).css("width", $(this).width() / $("a", this).length - 2);
});

```

Here is the Fiddle if someone wants to test: <http://jsfiddle.net/ErickPetru/6nSEj/3/>

**So, which block is better? And why?**