Bug 206500

Summary:	Regression in performance test "Layout Composites"
Product:	[Eclipse Project] Platform	Reporter:	Frederic Fusier <frederic_fusier>
Component:	SWT	Assignee:	Bogdan Gheorghe <gheorghe>
Status:	RESOLVED WONTFIX	QA Contact:
Severity:	minor
Priority:	P3	CC:	steve_northover
Version:	3.3	Keywords:	performance, test
Target Milestone:	3.4.2
Hardware:	PC
OS:	All
Whiteboard:

Description Frederic Fusier

2007-10-16 12:52:55 EDT

org.eclipse.swt.test.Layout Composites test shows negative numbers on Linux performance test boxes since build N20070819-0010:
 - RHEL 4.0 Sun 1.4.2_10 (3 GHz 2.5 GB): between -1.6% and -8.5%
 - RHEL 3.0 Sun 1.4.2_10 (3 GHz 2 GB): between -3.4% and -14.7%
 - RHEL 3.0 Sun 1.4.2_10 (2 GHz 512 MB): between +0.2% and -8.3%

The standard error of this test is OK (always below the 3% threshold), hence
confirms this regression which needs to be investigated.

Note that test duration is between 1s and 1.6s approx. and so, this
regression may not be noticeable by users => open with minor severity

Comment 1 Steve Northover

2008-01-22 18:25:18 EST

Let's investigate.

Comment 2 Frederic Fusier

2008-01-30 10:09:25 EST

In fact, it does not seem specific to Linux boxes as it's almost negative on Windows boxes as well.

Here are the intervals since 3.4M3:
Win XP Sun 1.4.2_10 (3 GHz 2 GB):   between -0.3% and -8.9%
Win XP Sun 1.4.2_10 (2 GHz 512 MB): between +1.7% and -9.6%

Comment 3 Frederic Fusier

2009-03-18 10:56:04 EDT

Close as WONTFIX as there won't be more performance tests on 3.4...