This is not the first time people have problem caused by switching to newest version of jQuery. Dustin Diaz, engineer at Twitter tweeted, “Turns out #NewTwitter has some major slowness due to upgrading from jQuery 1.4.2 to 1.4.4 – We will be downgrading.” Dustin Diaz’s further comments might prove useful to others working with JQuery.
- The scrolling was the worst issue and we’ll be moving away from a scroll event to a simple timed dispatcher.
- “@Stormchild yep. one of our engineers noted that it had a major regression in Sizzle (the selector engine) performance”
- @JoshStodola we always test. it passed all our selenium and unit tests without failure, but we are currently formulating new speed metrics
- @timhaines yes. it was a major factor. we are however taking even further steps into making the app faster.
- @adski there was a major regression in Sizzle, and we calculate the height of the document on scroll – an expensive operation gone wrong