How do i disable the intrinsic function usage of the JIT compiler?

• Java

I'm doing some performance tests on the JVM and I want to measure the impact of the use of intrinsic functions

I want to disable the JIT of some methods and use intrinsic functions without entering interpretation mode Is there any way to do this? thank you

Solution

use

java -XX:+UnlockDiagnosticVMOptions -XX:DisableIntrinsic=_<method_name>[,...]

for example

java -XX:+UnlockDiagnosticVMOptions -XX:DisableIntrinsic=_equals,_hashCode

As @ apangin noticed, you can first use - XX: printinsights to see which methods are actually intrinsic in the test and disable them

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