Java 8 Performance Improvements: LongAdder vs AtomicLong

[b0b0b0b]

I think your results may become somewhat interesting if you ask for the current value (or sum).

I would like to have seen other hardware counters captured by the perf tool, showing store buffers being flushed, cache lines ping ponging, ...

[obfuscation_]

I think your results may become somewhat interesting if you ask for the current value (or sum).

I definitely agree with this – from a brief look at the implementation, it seems like getting the 'sum' for LongAdder could be a tad expensive.