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Bug 311141

Summary:	Block selection is very slow for big blocks
Product:	[Tools] CDT	Reporter:	pkr
Component:	cdt-editor	Assignee:	Project Inbox <cdt-editor-inbox>
Status:	NEW ---	QA Contact:	Jonah Graham <jonah>
Severity:	normal
Priority:	P3	CC:	john, zeratul976
Version:	0 DD 1.1
Target Milestone:	---
Hardware:	PC
OS:	Linux
Whiteboard:

Description pkr

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

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

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

2023-04-19 05:58:51 EDT

Same sort of behaviour in PyDev in Eclipse 20230309-1520; looks more fundamental than a CDT issue.