Am 11.10.2011 13:36, schrieb Ulf Zibis:
I believe we changed from (b1 < xyz) to (b1 >> x) == -2 back to 2009(?) because
the benchmark shows the "shift" version is slightly faster. Do you have any
number
shows any difference now. My non-scientific benchmark still suggests the "shift"
type is faster on -server vm, no significant difference on -client vm.
In this sense, then you should do the same here:
87 private static boolean isNotContinuation(int b) {
88 return (b >> 6) != -2;
89 }
Another 3rd variant to compare for performance:
(needs only 1 constant to load in cpu register, and is a 1-byte op code)
87 private static boolean isNotContinuation(byte b) {
88 return b >= (byte)0xc0;
89 }
-Ulf
