On Thu, 1 May 2025 21:08:29 GMT, Roger Riggs <[email protected]> wrote:
>> Refactor AbstractStringBuilder to maintain consistency among count, coder,
>> and value buffers while the buffer capacity is being expanded and/or
>> inflated from Latin1 to UTF16 representations.
>> The refactoring pattern is to read and write AbstractStringBuilder fields
>> once using locals for all intermediate values.
>> Support methods are static, designed to pass all values as arguments and
>> return a value.
>>
>> The value byte array is reallocated under 3 conditions:
>> - Increasing the capacity with the same encoder
>> - Increasing the capacity and inflation to change the coder from LATIN1 to
>> UTF16
>> - Inflation with the same capacity
>>
>> Added StressSBTest to exercise public instance methods of StringBuilder.
>
> Roger Riggs has updated the pull request incrementally with one additional
> commit since the last revision:
>
> Added missing bugid to tests
> Applied review suggestions.
> Added convenience methods to StringLatin1 for 4 and 5 character literals to
> leverage optimizations for merged stores.
> Updated missing copyright years.
src/java.base/share/classes/java/lang/StringUTF16.java line 1549:
> 1547: putChar(value, i++, c4);
> 1548: putChar(value, i++, c5);
> 1549: assert(i == end);
We can also use `+1 +2 +3 +4` to replace `++`
checkBoundsBeginEnd(i, end, value);
putChar(value, i , c1);
putChar(value, i + 1, c2);
putChar(value, i + 2, c3);
putChar(value, i + 3, c4);
putChar(value, i + 4, c5);
-------------
PR Review Comment: https://git.openjdk.org/jdk/pull/24967#discussion_r2071148628
