RFR: JDK-8302323 Add repeat methods to StringBuilder/StringBuffer

[Jim Laskey]

On Thu, 23 Feb 2023 15:17:26 GMT, Raffaello Giulietti <rgiulietti at openjdk.org> wrote:

>> Add the ability to repeatedly append char and CharSequence data to StringBuilder/StringBuffer.
>
> src/java.base/share/classes/java/lang/AbstractStringBuilder.java line 1851:
> 
>> 1849:             while (count-- != 0) {
>> 1850:                 value[index++] = (byte) c;
>> 1851:             }
> 
> One could reduce to just one running var rather than two:
> 
> int index = this.count;
> int limit = index + count;
> for (; index != limit; ++index) {
>     value[index] = (byte) c;
> }

True.  Will test to see if there is any performance benefit.

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PR: https://git.openjdk.org/jdk/pull/12728