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Bug 311141 - Block selection is very slow for big blocks
Summary: Block selection is very slow for big blocks
Status: NEW
Alias: None
Product: CDT
Classification: Tools
Component: cdt-editor (show other bugs)
Version: 0 DD 1.1   Edit
Hardware: PC Linux
: P3 normal (vote)
Target Milestone: ---   Edit
Assignee: Project Inbox CLA
QA Contact: Jonah Graham CLA
URL:
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Keywords:
Depends on:
Blocks:
 
Reported: 2010-04-30 04:45 EDT by pkr CLA
Modified: 2023-04-19 05:58 EDT (History)
2 users (show)

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Description pkr CLA 2010-04-30 04:45:41 EDT 
Build Identifier: 1.14.2979 

When I use the blockselector to select ablock of 39000 lines the program is hanging.

Reproducible: Always

Steps to Reproduce:
1.start block selecter shift + alt + a
2.Start selecting a small block keep the shift key pressed.
3.Scroll with the mouse down to the last line which you want to select and go back in the editor with the mouse. now the block is selected an the system is hanging.
Comment 1 Anton Leherbauer CLA 2010-05-10 10:38:52 EDT 
Could you provide a thread dump of the JVM when it appears to hang?
For more information see http://wiki.eclipse.org/How_to_report_a_deadlock
Comment 2 Nathan Ridge CLA 2017-01-06 21:31:52 EST 
I don't have a file with 39000 lines, but I tried this on a file with about 3700 lines (I used Shift+Ctrl+End to select to the last line of the file), and manipulating that selection (e.g. growing it by 1 character horizontally) is very slow.

Probably not a deadlock but a poor (supra-linear) algorithm somewhere?
Comment 3 John McCabe CLA 2023-04-19 05:58:51 EDT 
Same sort of behaviour in PyDev in Eclipse 20230309-1520; looks more fundamental than a CDT issue.