RFR: 8355636: Reuse StringBuilder in printStackTrace [v6]
Shaojin Wen
swen at openjdk.org
Sat Apr 26 16:13:35 UTC 2025
> In the Throwable::printStackTrace method, StringBuilder is created multiple times to build String. By sharing StringBuilder to build String, object allocation and copying are reduced.
>
> In the scenario without suppressed and ourCause, unused IdentityHashMap is not created.
>
> Through these optimizations, the performance of `new Exception().printStackTrace()` can be improved by about 10%.
Shaojin Wen has updated the pull request incrementally with one additional commit since the last revision:
fix windows build error
-------------
Changes:
- all: https://git.openjdk.org/jdk/pull/24864/files
- new: https://git.openjdk.org/jdk/pull/24864/files/d5e9e413..6160f403
Webrevs:
- full: https://webrevs.openjdk.org/?repo=jdk&pr=24864&range=05
- incr: https://webrevs.openjdk.org/?repo=jdk&pr=24864&range=04-05
Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
Patch: https://git.openjdk.org/jdk/pull/24864.diff
Fetch: git fetch https://git.openjdk.org/jdk.git pull/24864/head:pull/24864
PR: https://git.openjdk.org/jdk/pull/24864
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