[foreign-memaccess+abi] RFR: Improve strlen performance [v9]
Per Minborg
pminborg at openjdk.org
Wed Aug 16 15:38:49 UTC 2023
> This PR suggests removing the use of native calls for strlen and instead use Java implementations.
>
> The PR also suggest performance improvements for quad word strlen.
>
> Here are some benchmarks that compares the performance of the new proposed methods with the performance of the JDK 21 variants (called "legacy" methods):
>
> <img width="2596" alt="image" src="https://github.com/openjdk/panama-foreign/assets/7457876/c785f341-c826-4e3e-bf56-8387b1e96010">
Per Minborg has updated the pull request incrementally with one additional commit since the last revision:
Use unaligned access and allow all segments to use chunked methods
-------------
Changes:
- all: https://git.openjdk.org/panama-foreign/pull/862/files
- new: https://git.openjdk.org/panama-foreign/pull/862/files/082e64bd..8c5059ae
Webrevs:
- full: https://webrevs.openjdk.org/?repo=panama-foreign&pr=862&range=08
- incr: https://webrevs.openjdk.org/?repo=panama-foreign&pr=862&range=07-08
Stats: 12 lines in 1 file changed: 0 ins; 10 del; 2 mod
Patch: https://git.openjdk.org/panama-foreign/pull/862.diff
Fetch: git fetch https://git.openjdk.org/panama-foreign.git pull/862/head:pull/862
PR: https://git.openjdk.org/panama-foreign/pull/862
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