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https://issues.apache.org/jira/browse/FELIX-6529?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17540869#comment-17540869
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Amit Mondal commented on FELIX-6529:
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[~karlpauls] I have just tested and analyzed the Framework 7.1.0-SNASHOT.
Unfortunately, there exist still lots of different duplicate strings that
originate from the Felix FW. For your further analysis, I have extracted the
dominant ones in CSV files that include only the GC roots for the instances
created in the FW.
Here is the
[link|https://amitinside-my.sharepoint.com/:u:/p/admin/EQ5xg7SFlgVNnVdFZUExOt8Bxxk1WCJl9AZMeirU-XMcTQ?e=6jXNBx]
to download the ZIP file comprising the CSV files with the GC roots to the
dominators.
> Improve memory usage ManifestParser using String deduplication
> --------------------------------------------------------------
>
> Key: FELIX-6529
> URL: https://issues.apache.org/jira/browse/FELIX-6529
> Project: Felix
> Issue Type: Improvement
> Reporter: Johannes Edmeier
> Assignee: Karl Pauls
> Priority: Major
> Fix For: framework-7.0.4
>
> Attachments: ManifestParser.patch, image-2022-05-13-14-16-39-509.png,
> image-2022-05-13-14-17-55-965.png
>
>
> In my heap dump I've seen a lot of duplicate Strings produced by the
> ManifestParser.
> It creates a lot of equal strings for the keys in the manifest but doesn't
> deduplicate them and they're hold forever producing a lot on retained heap.
> I've patched the ManifestParser to deduplicate just the keys and could save
> ~8 Megs of heap.
> Total usage before: 38MB after: 30MB
> Duplicated Strings before:
> !image-2022-05-13-14-16-39-509.png|width=658,height=203!
> Duplicated Strings after:
> !image-2022-05-13-14-17-55-965.png|width=793,height=200!
> See patch attached.
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