jmh

问题 I want to use JMH, an OpenJDK microbenchmark tool, with gradle . However, Im getting the NPE on compilation. On the other hand, JMH works when using from maven. I am not posting any build.gradle as it is basic - apply java plugin and add dependency on JHM tool ( org.openjdk.jmh:jmh-core:0.2 ). I have tried whats written here without success. What else I have to do? I think something with setting the agent, but I still didnt figure it out. Exception: :compileJava java.lang.NullPointerException

问题 I want to use JMH, an OpenJDK microbenchmark tool, with gradle . However, Im getting the NPE on compilation. On the other hand, JMH works when using from maven. I am not posting any build.gradle as it is basic - apply java plugin and add dependency on JHM tool ( org.openjdk.jmh:jmh-core:0.2 ). I have tried whats written here without success. What else I have to do? I think something with setting the agent, but I still didnt figure it out. Exception: :compileJava java.lang.NullPointerException

问题 I've decided to measure incrementation with different locking strategies and using JMH for this purpose. I'm using JMH for checking throughput and average time as well as simple custom test for checking correctness. There are six strategies: Atomic count ReadWrite locking count Synchronizing with volatile Synchronizing block without volatile sun.misc.Unsafe.compareAndSwap sun.misc.Unsafe.getAndAdd Unsynchronizing count Benchmark code: @State(Scope.Benchmark) @BenchmarkMode({Mode.Throughput,

问题 We have written JMH custom bench marking to our test cases, expected inputs we are reading from properties file. For each iteration we read input from properties file then we execute our actual logic, we are capturing time in milliseconds before and after execution of our logic. While starting the test case we pass number of iterations as argument, until 2000 iterations it is working fine. If we give iteration number more than 2000 then we are getting below error. A fatal error has been

问题 I'm using JMH benchmark in my project. I have method 1 and method 2 annotated with @Benchmark. I want the order to be: method1, method2, mehod1, method2... and so on... Which means: I wand that method 2 will immediately follow method 1. Is there a way to do so? Thank you! 回答1: The order in which JMH executes @Benchmark methods is usually irrelevant: the runs are isolated from each other, and so results are independent. But in case you still want the particular order, then @Benchmark -s are

问题 I'm using JMH benchmark in my project. I have method 1 and method 2 annotated with @Benchmark. I want the order to be: method1, method2, mehod1, method2... and so on... Which means: I wand that method 2 will immediately follow method 1. Is there a way to do so? Thank you! 回答1: The order in which JMH executes @Benchmark methods is usually irrelevant: the runs are isolated from each other, and so results are independent. But in case you still want the particular order, then @Benchmark -s are

问题 I'm using JMH benchmark in my project. I have method 1 and method 2 annotated with @Benchmark. I want the order to be: method1, method2, mehod1, method2... and so on... Which means: I wand that method 2 will immediately follow method 1. Is there a way to do so? Thank you! 回答1: The order in which JMH executes @Benchmark methods is usually irrelevant: the runs are isolated from each other, and so results are independent. But in case you still want the particular order, then @Benchmark -s are

问题 JDK is introducing an API Stream.toList() with JDK-8180352. Here is a benchmarking code that I have attempted to compare its performance with the existing Collectors.toList : @BenchmarkMode(Mode.All) @Fork(1) @State(Scope.Thread) @Warmup(iterations = 20, time = 1, batchSize = 10000) @Measurement(iterations = 20, time = 1, batchSize = 10000) public class CollectorsVsStreamToList { @Benchmark public List<Integer> viaCollectors() { return IntStream.range(1, 1000).boxed().collect(Collectors

问题 JDK is introducing an API Stream.toList() with JDK-8180352. Here is a benchmarking code that I have attempted to compare its performance with the existing Collectors.toList : @BenchmarkMode(Mode.All) @Fork(1) @State(Scope.Thread) @Warmup(iterations = 20, time = 1, batchSize = 10000) @Measurement(iterations = 20, time = 1, batchSize = 10000) public class CollectorsVsStreamToList { @Benchmark public List<Integer> viaCollectors() { return IntStream.range(1, 1000).boxed().collect(Collectors

问题 In my scenario, the methods in benchmark should run sequentially in one thread and modify the state in order. For example, there is a List<Integer> called num in the benchmark class. What I want is: first, run add() to append a number into the list. Then, run remove() to remove the number from the list. The calling sequence must be add() --> remove() . If remove() runs before add() or they run concurrently, they would raise exceptions because there's no element in the list. That is, add() and