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

[Alan Bateman]

On Wed, 8 Oct 2025 23:59:53 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`.

src/java.base/unix/classes/sun/nio/fs/UnixPath.java line 965:

> 963:                         path = path.resolve(entry);
> 964:                         break;
> 965:                     } else if (name.toString().equalsIgnoreCase(elementName)) {

The compareTo at L961 looks right but the using toString is problematic here is problematic. If the name and element are not equal then I think it has to use file key.

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PR Review Comment: https://git.openjdk.org/jdk/pull/27709#discussion_r2416360621