[salibhai]

When performance matters, or you are doing things on an order of magnitude, you may want to skip jquery

[corobo]

Do you have any examples or writeups to hand where rewriting jQuery functions ended up in a faster site?

Specifically in cases where other optimizations (caching, beefier servers, faster SQL, SSDs vs HDDs, etc) didn't help more?

[vorotato]

Beefing up the server cannot improve client side code. Jquery is quite slow, nice, but quite slow. Sometimes writing out those 8 lines can make your code literally 400 times faster.(source : http://vanilla-js.com/) So yes if performance is a concern, you might want to look at writing it yourself.

[corobo]

Very good point, I'd not really considered the lower end spec'd machines, was more thinking overall page load times and the likes. Thanks :)

[Aldo_MX]

So if I buy a beefier server, my users with a netbook (ca. 2007) will feel a responsive[1] website?

[1] Responsive as in "Mozilla Firefox is not responding", not as in "Responsive Design".

[corobo]

Good point, not well made. Thanks for the response.