RFR: 8376403: Avoid loading ArrayDeque in java.util.zip.ZipFile [v4]

Eirik Bjørsnøs eirbjo at openjdk.org
Fri Feb 20 12:51:12 UTC 2026


> Hot on the heals of #29288, this PR replaces `ArrayDeque` with `ArrayList` for the Inflater cache implementation in `ZipFile.CleanableResource`.
> 
> With this PR, we change the order of the cache from a LIFO queue to a FIFO stack backed by ArrayList. The order seems unimportant, and has indeed been FIFO in the past when using `java.util.Vector`. Intuitively, it should be better to return the most recently used Inflater.
> 
> No tests updated, strict refactoring, `noreg-cleanup`.

Eirik Bjørsnøs has updated the pull request incrementally with three additional commits since the last revision:

 - Add code comment about returning the most recently used Inflater from the cache
 - Replace polling-style iteration with simple for loop
 - Using add instead of addLast seems more natural for a List

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/29430/files
  - new: https://git.openjdk.org/jdk/pull/29430/files/388306a7..02de2507

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=29430&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=29430&range=02-03

  Stats: 5 lines in 1 file changed: 1 ins; 1 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/29430.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29430/head:pull/29430

PR: https://git.openjdk.org/jdk/pull/29430


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