Is jdk11 not optimized when changing to JIT optimization?

[lts0609]

When I execute the following code, I see that there are clear differences between different jdk versions, I try to force compilation using the JIT option count=0, and the test will run in ten seconds. Is this because the JIT did not identify the code that needs to be optimized, resulting in a performance difference?

public class Test { 
    static int[] LoopTest(int a, int limit, int[] arr) {
        while (a-- != Integer.MIN_VALUE) {
            if (arr[arr.length - 1] >= limit)
            break;
            }
        return arr;
        }
    public static void main(String[] args) throws Exception {
        int limit = 8;
        int a= 998376598;
        int[] arr = {2,-1};
        LoopTest(a, limit, arr);
    }
}
    

openj9-21.0.1

real 1m41.887s
user 1m41.685s
sys 0m0.677s
openj9-11.0.14 Test

real 0m46.642s
user 0m46.825s
sys 0m0.137s

openj9-21.0.1/bin/java -Xjit:count=0 Test

real 0m7.735s
user 0m7.326s
sys 0m0.542s

[lts0609]

When I run the code using hotspot-jdk8u352 the result is only 0.664s

[pshipton]

Some of the comments in #19057 (comment) might apply here as well.

@hzongaro fyi

[lts0609]

Thank you for your answer. Could you please tell me why openj9 and hotspot have the same JIT optimization, but the running time of openj9 is still higher than that of hotspot. Is this because the optimization processing of openj9 and hotspot is different?