Why is long slower than int in x64 Java?

Question

I\'m running Windows 8.1 x64 with Java 7 update 45 x64 (no 32 bit Java installed) on a Surface Pro 2 tablet.

The code below takes 1688ms when the type of i is a long

Answer 1

For the records:

if i use

boolean decrementAndCheckLong() {
    lo = lo - 1l;
    return lo < -1l;
}

(changed "l--" to "l = l - 1l") long performance improves by ~50%