Some Eclipse Foundation services are deprecated, or will be soon. Please ensure you've read this important communication.
Bug 324350 - Reports run slow the first time after application server is restarted
Summary: Reports run slow the first time after application server is restarted
Status: CLOSED INVALID
Alias: None
Product: z_Archived
Classification: Eclipse Foundation
Component: BIRT (show other bugs)
Version: 2.6.0   Edit
Hardware: All Linux
: P3 major (vote)
Target Milestone: 3.7.0   Edit
Assignee: Birt-ReportEngine-inbox@eclipse.org CLA
QA Contact: Xiaoying Gu CLA
URL:
Whiteboard: Obsolete
Keywords:
Depends on:
Blocks:
 
Reported: 2010-09-02 16:11 EDT by vivek CLA
Modified: 2011-05-26 13:32 EDT (History)
2 users (show)

See Also:

Attachments
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 vivek CLA 2010-09-02 16:11:49 EDT 
Build Identifier: Birt 2.6

After upgrading our reports from Birt 2.3.0 to 2.6 we noticed that most of our reports are running slow after the application was started, but the subsequent runs are faster. I'm not sure if this is some new thing since 2.3 - like caching or configuration.

After discussion with Jason on forum (http://www.birt-exchange.org/org/forum/index.php/topic/20400-performance-degradation-when-upgrading-from-birt-2-3-to-2-6/) he suggested the following,

"The first time BIRT runs a report it is always slower as the engine has to crank up OSGi. ... you can open a bug entry to possibly prestart the engine."

I've seen this issue mostly with reports that are dynamically generated, i.e, the whole table, header generated at run-time using the APIs.

Reproducible: Always
Comment 1 Jun Ouyang CLA 2010-11-02 02:11:06 EDT 
It's expected behavior because many resources are loaded lazily when first time a reports get run.