Tag: cpu

Performance analysis of Java loop variants

What is the fastest loop variant? Does it even matter?

5 minute read

From time to time I profile Gaia Sky to find CPU hot-spots that are hopefully easy to iron out. To do so, I launch my profiler of choice and look at the CPU times for the top offender methods. Today I went through such a process and was surprised to find a forEach() method of the Java streams API among the worst offenders. Was the forEach() slowing things down or was it simply that what’s inside the loop took too long to process? I found conflicting and inconsistent reports in the interwebs, so I set on a quest to provide my own answers.

Website design by myself. See the privacy policy.
Content licensed under CC-BY-NC-SA 4.0.