Some Eclipse Foundation services are deprecated, or will be soon. Please ensure you've read this important communication.
Bug 360370 - rwt.widgets.Grid.js#isItemSelected slow when many items selected
Summary: rwt.widgets.Grid.js#isItemSelected slow when many items selected
Status: ASSIGNED
Alias: None
Product: RAP
Classification: RT
Component: RWT (show other bugs)
Version: unspecified   Edit
Hardware: All All
: P3 normal with 1 vote (vote)
Target Milestone: ---   Edit
Assignee: Project Inbox CLA
QA Contact:
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2011-10-09 18:09 EDT by Clemens Schneider CLA
Modified: 2016-01-26 05:56 EST (History)
1 user (show)

See Also:

Attachments
chrome profile of shift-selecting 50000 items in table (21.84 KB, image/png)
2011-10-09 18:09 EDT, Clemens Schneider CLA 		no flags Details
View All Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.
Description Clemens Schneider CLA 2011-10-09 18:09:15 EDT 
Created attachment 204846 [details]
chrome profile of shift-selecting 50000 items in table

When having many elements (e.g. 50000) in a table and then doing a shift-select from first to last element, the UI freezes for quite some time. Profiling in chrome shows that most of the time is spent in org.eclipse.rwt.widgets.Tree#isItemSelected (see attachment). Couldn't the check be performed more efficiently?
Comment 1 Tim Buschtoens CLA 2011-11-07 12:02:17 EST 
Using a hashmap might be faster, but that would have to be proven before we think ab out how to implement that.
Comment 2 Ivan Furnadjiev CLA 2016-01-26 05:56:14 EST 
The client-side class has been renamed a while ago, but the function under discussion is still there. Change the title accordingly.