evernat created JENKINS-13454:
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Summary: Optimize the plugin manager
Key: JENKINS-13454
URL: https://issues.jenkins-ci.org/browse/JENKINS-13454
Project: Jenkins
Issue Type: Improvement
Components: update-center
Environment: Jenkins 1.459, Oracle JDK 1.7, Windows XP
Reporter: evernat
Assignee: evernat
Attachments: monitoring.png
In "Manage Jenkins", the plugin manager (aka update center) is rather slow.
Slow is about 3 to 6 seconds on my windows laptop.
The http requests of the plugin manager are mostly the slowest of all, as can
be seen in the joined screenshot of the monitoring plugin.
The screenshot also shows that those http requests have a high cpu usage.
The cause of the issue is that for each plugin, the
UpdateSite.getPlugin(String) and getData() methods read and parse all the
plugins data from the "updates/default.json" file each time.
So the more plugins are available, the slower it is.
I will submit a pull request.
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