'no assembly is recorded'

[Aleksey Shipilev]

On 1/15/19 9:19 PM, Сергей Цыпанов wrote:
> @State(Scope.Thread)
> @BenchmarkMode(Mode.AverageTime)
> @OutputTimeUnit(TimeUnit.NANOSECONDS)
> @Fork(jvmArgsAppend = {"-XX:+UseParallelGC", "-Xms2g", "-Xmx2g"})
> public class ArrayInstantiationBenchmark {
> 
>   @Param({"10"})
>   private int length;
> 
>   @Benchmark
>   public Object newInstance() {
>     return Array.newInstance(Object.class, length);
>   }
> }
> 
> This file contains output for C1: https://yadi.sk/i/DGQuTsvRqdiTkg

So there are entries for "c1, level 1" in there. What you are seeing is Array.newInstance calling
into VM right away, and the hot spot is there. C2 has the intrinsic for
java.lang.reflect.Array::newArray.

-Aleksey