FYC : JDK-7197183 : Improve copying behaviour of String.subSequence()
Ulf Zibis
Ulf.Zibis at CoSoCo.de
Tue Feb 19 19:55:45 UTC 2013
Am 19.02.2013 20:00, schrieb Mike Duigou:
> If I update this patch I will add Ulf suggestion of adding AbstractStringBuilder as a third
> instanceof case. Mike
Thanks!
I'm stil wondering, why HotSpot doesn't optimize
for (int i = start, j = count; i < end; i++, j++) {
value[j] = s.charAt(i);
}
to something equivalent of System.arrayCopy(...)
Maybe we could introduce a new intrinsic for something like
CharSequence.rangeCopy(int start, int end, CharSequence dst, int start)
-Ulf
More information about the core-libs-dev
mailing list