Refreshing jQuery variable as selector vs re-using selector performance

Question

我想知道如果在刷新一个jQuery变量作为一个选择之间的性能差异的任何像这样的 ，只是使用选择两次。

Answer 1

In the link you provided there is no functional difference. The only change is in the source of the selector string (hard-coded as opposed to derived from a property). In both cases the same selector string is run through jQuery.

Answer 2

Everyone's answer so far is true:

1. The difference is negligible (see next point for proof)
2. You can put them in a loop and try ( http://jsperf.com/selector-refresh-vs-new-selector )
3. In both cases the selector string is the same
4. The selector property is deprecated