Integrated: 8299807: newStringNoRepl should avoid copying arrays for ASCII compatible charsets

[Glavo]

On Fri, 20 Jan 2023 16:47:27 GMT, Glavo <duke at openjdk.org> wrote:

> This is the javadoc of `JavaLangAccess::newStringNoRepl`:
> 
> 
>     /**
>      * Constructs a new {@code String} by decoding the specified subarray of
>      * bytes using the specified {@linkplain java.nio.charset.Charset charset}.
>      *
>      * The caller of this method shall relinquish and transfer the ownership of
>      * the byte array to the callee since the later will not make a copy.
>      *
>      * @param bytes the byte array source
>      * @param cs the Charset
>      * @return the newly created string
>      * @throws CharacterCodingException for malformed or unmappable bytes
>      */
> 
> 
> It is recorded in the document that it should be able to directly construct strings with parameter byte array to reduce array allocation.
> 
> However, at present, `newStringNoRepl` always copies arrays for UTF-8 or other ASCII compatible charsets.
> 
> This PR fixes this problem.

This pull request has now been integrated.

Changeset: 7449e1c6
Author:    Glavo <zjx001202 at gmail.com>
Committer: Roger Riggs <rriggs at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/7449e1c6617f51101e415fc29fafa79c6b55e24d
Stats:     16 lines in 2 files changed: 11 ins; 0 del; 5 mod

8299807: newStringNoRepl should avoid copying arrays for ASCII compatible charsets

Reviewed-by: rriggs

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PR: https://git.openjdk.org/jdk/pull/12119