On Tue, 5 Jan 2021 17:44:20 GMT, Philippe Marschall
<github.com+471021+marsch...@openjdk.org> wrote:
>> Implement three optimiztations for Reader.read(CharBuffer)
>>
>> * Add a code path for heap buffers in Reader#read to use the backing array
>> instead of allocating a new one.
>> * Change the code path for direct buffers in Reader#read to limit the
>> intermediate allocation to `TRANSFER_BUFFER_SIZE`.
>> * Implement `InputStreamReader#read(CharBuffer)` and delegate to
>> `StreamDecoder`.
>> * Implement `StreamDecoder#read(CharBuffer)` and avoid buffer allocation.
>
> Philippe Marschall has updated the pull request incrementally with one
> additional commit since the last revision:
>
> Update copyright years
src/java.base/share/classes/java/io/Reader.java line 198:
> 196: } else {
> 197: int remaining = target.remaining();
> 198: char cbuf[] = new char[Math.min(remaining,
> TRANSFER_BUFFER_SIZE)];
As `cbuf` for the off-heap case is used in a synchronized block, is there the
opportunity for some sort of cached array here and would it help?
-------------
PR: https://git.openjdk.java.net/jdk/pull/1915
