On Fri, 8 Dec 2023 15:46:31 GMT, Sergey Tsypanov <stsypa...@openjdk.org> wrote:

>> It looks like we can skip copying of `byte[]` in 
>> `BufferedInputStream.implTransferTo()` for `OutputStreams` residing in 
>> `java.io`.
>> 
>> See comment by @vlsi in 
>> https://github.com/openjdk/jdk/pull/10525/files#diff-e19c508d1bb6ee78697ecca66947c395adda0d9c49a85bf696e677ecbd977af1R612
>
> Sergey Tsypanov has updated the pull request incrementally with one 
> additional commit since the last revision:
> 
>   8320971: Use same approach as BAOS

src/java.base/share/classes/java/io/OutputStream.java line 212:

> 210:      * @return true if the argument of {@link #write(byte[])}} and 
> {@link #write(byte[], int, int)}} needn't be copied
> 211:      */
> 212:     boolean trusted() {

This is a strange construction. Any subclass could simply implement this as 
`return true;`. Where is the guard against this, and why not doing it that way?

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PR Review Comment: https://git.openjdk.org/jdk/pull/16879#discussion_r1420812353

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