In Javascript/jQuery, is there a difference in rendering performance if I condense my code into "one-liners"?
Is there a difference in performance (I am not asking about readability) if I condense my code into one line versus two?
For example:
var slide = 'images/' + n + '.png';
$('img').attr('src',slide);
versus
$('img').attr('src','images/' + n + '.png');
Personally, I like fewer lines o开发者_如何学编程f code. Often, I am the only one reading my code, so communicating intent is not as important.
I am curious if the Javascript interpreter executes one of the above options faster (even though this is a classic micro-optimization example).
No difference in rendering performance, at all.
Micro-optimization doesn't half say it. :-)
The answer will depend a lot on the interpreter involved. I wouldn't be surprised if IE's interpreter had a very very very very very very (...continue saying "very" for a while...) very slight, impossible to detect difference. Chrome's V8, on the other hand, is certain not to.
In real terms, though? No, no difference at all.
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