Performance of Interlocked.Increment

Question

Is Interlocked.Increment(ref x) faster or slower than x++ for ints and longs on various platforms?

Answer 1

My perfomance test:

volatile: 65,174,400

lock: 62,428,600

interlocked: 113,248,900

TimeSpan span = TimeSpan.FromSeconds(5);

object syncRoot = new object();
long test = long.MinValue;

Do(span, "volatile", () => {

    long r = Thread.VolatileRead(ref test);

    r++;

    Thread.VolatileWrite(ref test, r);
});

Do(span, "lock", () =>
{
    lock (syncRoot)
    {
        test++;
    }
});

Do(span, "interlocked", () =>
{
    Interlocked.Increment(ref test);
});