Please review this simple change to remove filler arrays (and objects) from
heap dumps. In the hprof format, they are not distinguishable from `int[]`,
which can be confusing (where are these huge `int[]`s coming from in my
application?), and they bloat the heap dump time and size.
Using Eclipse MAT, before:
with-filler.hprof - 6.2GB
Class Name | Objects | Shallow Heap
=====================================
byte[] 39,938 4,997,553,360
int[] 45,839 1,140,524,000
After:
without-filler.hprof - 5.0GB
Class Name | Objects | Shallow Heap
=====================================
byte[] 48,321 4,998,520,248
int[] 4,995 951,088
([Test
file](https://gist.github.com/olivergillespie/1661499afb9e1c708de30cf0bdfca30e))
---------
- [x] I confirm that I make this contribution in accordance with the [OpenJDK
Interim AI Policy](https://openjdk.org/legal/ai).
-------------
Commit messages:
- 8372389: Remove filler arrays from heap dump
Changes: https://git.openjdk.org/jdk/pull/32542/files
Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=32542&range=00
Issue: https://bugs.openjdk.org/browse/JDK-8372389
Stats: 5 lines in 1 file changed: 5 ins; 0 del; 0 mod
Patch: https://git.openjdk.org/jdk/pull/32542.diff
Fetch: git fetch https://git.openjdk.org/jdk.git pull/32542/head:pull/32542
PR: https://git.openjdk.org/jdk/pull/32542
