Memcpy and heap allocations in DtCrowdTelemetry.Stop()

[wrenge]

This causes the entire list to be copied over. It's pretty slow, if we going to do this every game cycle.

if (s.Count == TIMING_SAMPLES)
{
    s.RemoveAt(0);
}

This is Linq call and will cause memory allocation. Would be nice to avoid that, especially in a code that supposed to measure performance.

_executionTimings[name] = (long)s.Average();

I would replace List with some sort of cyclic buffer to avoid removing elements and replace Linq query with foreach cycle or even SIMD.

[ikpil]

Merged! Thank you for your contribution! @wrenge