我想使用JMH来衡量Fibonacci函数的性能。
但是在编译时,我遇到了以下错误:
Exception in thread "main" java.lang.RuntimeException: ERROR: Unable to find the resource: /META-INF/BenchmarkList
at jmh.core@1.34/org.openjdk.jmh.runner.AbstractResourceReader.getReaders(AbstractResourceReader.java:98)
at jmh.core@1.34/org.openjdk.jmh.runner.BenchmarkList.find(BenchmarkList.java:124)
at jmh.core@1.34/org.openjdk.jmh.runner.Runner.internalRun(Runner.java:253)
at jmh.core@1.34/org.openjdk.jmh.runner.Runner.run(Runner.java:209)
at jmh.core@1.34/org.openjdk.jmh.Main.main(Main.java:71)
at project/Mypackage.BenchmarkRunner.main(BenchmarkRunner.java:6)
我使用IntelliJ IDEA
我使用openJDK 16
我尝试在Resources目录中添加文件夹和文件/META-INF/BenchmarkList
但是出现了以下错误:
No matching benchmarks. Miss-spelled regexp?
Use EXTRA verbose mode to debug the pattern matching.
我的主类启动了基准测试:
public class BenchmarkRunner {
public static void main(String[] args) throws Exception {
org.openjdk.jmh.Main.main(args);
}
}
我想要测量性能的是具有Fibonacci方法的类
public class TestClassMesurment {
@Benchmark
@BenchmarkMode(Mode.AverageTime)
@Fork(value = 1)
@Warmup(iterations = 2)
@Measurement(iterations = 1)
public void init() {
fib(52);
//fibbonaci(300);
}
static int fib(int n) {
if (n<2) return 1;
else return fib(n-1) + fib(n-2);
}
double fibbonaci(int n){
double prev=0d, next=1d, result=0d;
for (int i = 0; i < n; i++) {
result=prev+next;
prev=next;
next=result;
}
return result;
}
}