Java record program running time

Duration , like Instant, is an immutable and thread-safe class. As you can see, there are alternatives that cater to different needs.

Finally, if you have more advanced benchmarking needs, you might want to check out more sophisticated alternatives , such as a full-fledged APM system. Click here to read more about the acquisition. Try Our Free Code Profiler. Try Our Code Profiler. By Role. By Technology. By Language.

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Is it going to be exact if the method involves lots of db transactions? This is outdated. Better answers all across SO - this should be deleted. Especially since it doesn't discourage manual calculation of unit conversions.

I've updated the answer to avoid misleading people arriving at it. Show 1 more comment. You can for example print this value like this: System. Rakib Ansary 3, 2 2 gold badges 17 17 silver badges 28 28 bronze badges. What is happening between the two calls to nanoTime has absolutely no impact.

See here. Have a look at System. You may also try Perf4J. Its a neat way of doing what you are looking for, and helps in aggregated performance statistics like mean, minimum, maximum, standard deviation and transactions per second over a set time span. Using System. But, if you use command line, and you want to time the whole program approximately and quickly, think about:.

Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. How to time Java program execution speed Ask Question. Asked 11 years, 9 months ago. Active 11 months ago. Viewed k times.

Improve this question. Willi Mentzel George Mic George Mic 2 2 gold badges 8 8 silver badges 6 6 bronze badges. Add a comment. Active Oldest Votes. Improve this answer. Should not be nanoTime. See rhu's answer.