[XALANC-556] Major performance issue

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.9
• Fix Version/s: CurrentCVS
• Component/s: XalanC
• Assignee: Unassigned
• Reporter: Yves Monier
• Created: 30/Aug/05 22:57
• Updated: 31/Aug/05 01:56
• Resolved: 31/Aug/05 01:56

Description

I recently switched from xalan-c 1.4 (with xerces-c 2.1.0) to xalanc-c 1.9 (xerces-c 2.6.0) for compatibility reasons with some of our supported linux platforms.
No more compilation/link issues now with version 1.9 but it appears that this version is MUCH slower than 1.4, at least with the xml & xsl files I deal with...
I did some tests with different sizes for my xml file, using Xalan.exe from the command line:
92 kb xml: approx. 1.5s for xalan-c 1.9 (approx. 2s for version 1.4)
491kb: 10s (3s for v1.4)
937kb: 21s (4s)
1128kb: 33s (4s)
1505kb: 1m25s (4s)
...
...
14655kb: 1h27m (22s) !!!

The xsl uses two xsl:key for Muenchian grouping. Nothing especially tricky, at least for other processors like xalan-c 1.4 and saxon...
I had a look to the xalan-c mailing list archive and open bugs but found nothing on performance aspects...

Issue Links

• duplicates: XALANC-539 XalanMap needs to compact buckets to prevent long search times and ever-increasing memory usage.