OOME in simple benchmark

[Vladimir Sitnikov]

Сергей> .measurementIterations(20)

Suppose you add .measurementTime(TimeValue.seconds(1)) for clarity.
Then measurementIterations(20) would mean JMH would perform 20 loops of
1-second long tests. JMH would perform as many executions of benchmark
method as it can during those 1-second long tests. That is why you are
getting OOM.

If you want to call benchmark method 20 times only, then you need something
like @BenchmarkMode(Mode.SingleShotTime)

Does that make sense?

Vladimir