[FELIX-6529] Improve memory usage ManifestParser using String deduplication

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: framework-7.0.4
• Assignee: Karl Pauls
• Reporter: Johannes Edmeier
• Created: 13/May/22 12:19
• Updated: 25/May/22 14:41
• Resolved: 19/May/22 22:09

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:

Duplicated Strings after:

See patch attached.

Issue Links

• links to: GitHub Pull Request #151