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https://issues.apache.org/jira/browse/FELIX-6529?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Johannes Edmeier updated FELIX-6529:
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Description:
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.
was:
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!
Duplicated Strings after:
!image-2022-05-13-14-17-55-965.png!
See patch attached.
> 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
> Priority: Major
> 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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