Firefox is very slow with very big sortable lists

[larz]

If I use very big (100+) sortable lists (tested with clean code and in projects) The Firefox Browser is very slow (other Browsers Safari, Opera, IE are normal)

Tested with Jquery 1.4.4 up to 1.5 and UI 1.8.7, 1.8.10

I tried a lot to fix it but I have not the solution yet ;-(

[tj.vantoll]

Thanks for taking the time to contribute to the jQuery UI project! Please provide a complete reduced test case on jsFiddle to help us assess your ticket.

Additionally, be sure to test against the git version of both jQuery UI and jQuery to ensure the issue still exists. To get you started, use this boilerplate: ​http://jsfiddle.net/ZgAqH/ Open the link and click to "Fork" (in the top menu) to get started.

I created an example with 300 sortable items and it behaves just fine in Firefox 16 on OS X - ​http://jsfiddle.net/tj_vantoll/Fkh4b/.

[trac-o-bot]

Because we get so many tickets, we often need to return them to the initial reporter for more information. If that person does not reply within 14 days, the ticket will automatically be closed, and that has happened in this case. If you still are interested in pursuing this issue, feel free to add a comment with the requested information and we will be happy to reopen the ticket if it is still valid. Thanks!