RFR: 8368633: (fs) Path.toRealPath(NOFOLLOW_LINKS) very slow on macOS [v2]

[Alan Bateman]

On Fri, 10 Oct 2025 23:02:24 GMT, Brian Burkhalter <bpb at openjdk.org> wrote:

>> Try to avoid checking file keys for all entries by first attempting `Path.compareTo` and `String.equalsIgnoreCase`.
>
> Brian Burkhalter has updated the pull request incrementally with one additional commit since the last revision:
> 
>   8368633: Compare byte representations first then file keys; add micro

test/micro/org/openjdk/bench/java/nio/file/ToRealPath.java line 52:

> 50:             files[i] = p;
> 51:         }
> 52:     }

You can use `@TearDown` to remove the files.

I think we'll need the benchmark to exercise some longer paths. Also I think it will have to exercise case sensitive, in this case the benchmark invokes toRealPath on "rEALpATH". That should give you a couple of scenarios that exercise both the first and second iterations.

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PR Review Comment: https://git.openjdk.org/jdk/pull/27709#discussion_r2422547763