[issue17615] String comparison performance regression
Serhiy Storchaka
report at bugs.python.org
Mon Apr 8 12:24:48 CEST 2013
Serhiy Storchaka added the comment:
You can use a single switch instead nested switches:
switch ((kind1 << 3) + kind2) {
case (PyUnicode_1BYTE_KIND << 3) + PyUnicode_1BYTE_KIND: {
int cmp = memcmp(data1, data2, len);
...
}
case (PyUnicode_1BYTE_KIND << 3) + PyUnicode_2BYTE_KIND:
COMPARE(Py_UCS1, Py_UCS2);
break;
...
}
I don't know if there is any effect.
----------
components: +Interpreter Core
stage: needs patch -> patch review
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<http://bugs.python.org/issue17615>
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