On Wed, 20 Jan 2021 15:08:22 GMT, Claes Redestad <redes...@openjdk.org> wrote:

>> This patch improves `UnixPath.encode` by reusing `JLA.getBytesNoRepl` (which 
>> has fast-paths for common encoding) and avoiding a `toCharArray` call on the 
>> input by refactoring the `normalizeNativePath` code to operate on `String`. 
>> This might have a cost on files on Mac that need additional native 
>> normalization.
>> 
>> This removes another `ThreadLocal` and a source of `SoftReference`s. 
>> Together with the UTF-8 fast-path my UTF-8 encoded file system see 
>> substantial speed-ups in a trivial `new File(str).toPath()` microbenchmark.
>
> Claes Redestad has updated the pull request with a new target base due to a 
> merge or a rebase. The incremental webrev excludes the unrelated changes 
> brought in by the merge/rebase. The pull request contains six additional 
> commits since the last revision:
> 
>  - Merge branch 'master' into unix_encode
>  - Move FileOpen.ToPath micros into top class
>  - Move JLA to top, add imports
>  - Fold ToPath into FileOpen, add root benchmarks to keep mix comparable
>  - Add micro. To properly examine cost of toPath() needs a new File due 
> caching - use FileOpen as a baseline
>  - Optimize UnixPath.encode

Marked as reviewed by shade (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/2135

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