Need reviewer for forward port of 6815768 (File.getXXXSpace) and 6815768 (String.hashCode)
Ulf Zibis
Ulf.Zibis at gmx.de
Fri Feb 26 17:11:46 UTC 2010
Am 26.02.2010 17:10, schrieb Ulf Zibis:
> Additionally we can save double incrementing of int i and off:
>
> public int hashCode() {
> int h = hash;
> if (h == 0) {
> int len = count;
> if (len> 0) {
> char[] val = value;
> // for (int i = offset, len += i; i< len; ) // would be nice
> syntax -> RFE to project coin
> for (int i = offset, limit = len += i; i < len; i++)
> h = 31*h + val[i];
> hash = h;
> }
> }
> return h;
> }
>
And in hotspot/src/share/vm/classfile/symbolTable.cpp :
int StringTable::hash_string(jchar* s, int len) {
unsigned h = 0;
for (len = s + len*sizeof(jchar); s < len; s++)
h = 31*h + (unsigned) *s;
return h;
}
-Ulf
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