<i18n dev> RFR: 8300818: Reduce complexity of padding with DateTimeFormatter [v5]

[Roger Riggs]

On Tue, 18 Apr 2023 18:49:54 GMT, Sergey Tsypanov <stsypanov at openjdk.org> wrote:

>> Currently it's O(n) - we do `n` shifts of bytes within `StringBuilder`. This can be reduced to O(1) improving the code like:
>> 
>> DateTimeFormatter dtf = new DateTimeFormatterBuilder()
>>   .appendLiteral("Date:")
>>   .padNext(20, ' ')
>>   .append(DateTimeFormatter.ISO_DATE)
>>   .toFormatter();
>> String text = dtf.format(LocalDateTime.now());
>
> Sergey Tsypanov has updated the pull request incrementally with one additional commit since the last revision:
> 
>   8300818: special cases

test/micro/org/openjdk/bench/java/time/format/DateTimeFormatterBench.java line 122:

> 120:     }
> 121: 
> 122: }

Drop this blank line and there will be no changes.

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/12131#discussion_r1171524385