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Questions tagged [jmh]

The Java Microbenchmark Harness (JMH) is a Java harness for building, running, and analysing nano/micro/macro benchmarks written in Java and other languages targetting the JVM.

jmh is a Java harness for building, running, and analysing nano/micro/macro benchmarks written in Java and other languages targetting the JVM. It is part of openjdk.

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java micro benchmark to find average from list

I have file with some amount of different strings (about 100.000 taken from prod). Need to find out 99%, 99.9% for function that process each string from that file. I've tried to use jmh to write benchmark. However, I was able to find out required…
Natalia
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When does it make sense to use Statistics#compareTo(Statistics, double) to compare Statistics?

I would like to know in which circumstances it is interesting to compare Statistics using a confidence thanks to the method Statistics#compareTo(Statistics, double). Does it make sense to use this method to compare the performances of 2 approaches?…
Nicolas Filotto
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JMH setup and tear down

I've created a class. Within that class I have several methods that are marked as @Benchmark. I also have a main method that runs the JMH benchmarks: System.out.println("NUMBER OF THREADS: "+numOfThreads); Options opt = new OptionsBuilder() …
TaliG
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JMH static final field as parameter

I see in JMH a popular problem with ConstantFold, but what if I have inverse problem. I need the static final field as parameter. For example, it's can be some constant variable for some algorithm. But in java-doc I see: {@link Param} fields should…
Ilya K.
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what does this forkjoinreuse and forkjoindeeprecursive mean?

I have been trying to understand this micro-benchmark. In the source there are four types of ForkJoin: ForkJoinreuse and ForkJoinrecursivedeep. I don't understand in which way they are different from ForkJoin and ForkJoinrecursive, even when I have…
Bionix1441
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How to use Java 8 for JMH?

I wrote a benchmark using JMH and when building I get the following a compilation failure lambda expressions are not supported in -source 1.6 [ERROR] (use -source 8 or higher to enable lambda expressions) JAVA_HOME is set to jdk1.8_40. I have…
Bionix1441
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Run Micro-benchmark in application servers [JMH]

I read about JMH and tried the samples provided. What I am trying to do is measure the stats of following scenario, [ 1] client order -> [2] server -> [3] start processing the order -> [4] processed the order successfully and ready to send -> [5]…
Isuru Gunawardana
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Testing Java Reflection, Method Handles and Mirror performance

I'm testing how much performance Method Handles (delivered with Java 7) have against Java Reflection and Mirror (A fluent API to work with reflection - http://projetos.vidageek.net/mirror/mirror/). So I don't know if I wrote the test code…
Otávio Garcia
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jmh No matching benchmarks. Miss-spelled regexp? Use -v for verbose output.

I'm implementing sample application for my understanding of JMH. i was having issue while running it. I found this error No matching benchmarks. Miss-spelled regexp? Use -v for verbose output. here is my code. public class TestJMS { …
Muneeb Nasir
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JMH Benchmark weird performance because @Param annotation

I try to use JMH with parameters, but I get weird results when @Param annotation is used. Here is case with hard-coded function argument: @BenchmarkMode(Mode.Throughput) @OutputTimeUnit(TimeUnit.SECONDS) @Warmup(iterations = 3, time = 3, timeUnit =…
Argamidon
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Java JMH tool for complete application performance testing

I have gone through many articles on java JMH .But nothing specifies about the java JHM for complete java application performance testing ?? Is this the suitable tool for the same . If No, please support with suitable reason. Thanks in advance
user10145791
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How is this JMH microbenchmark skewed, if it is?

The benchmark is quite simple: @State(Scope.Benchmark) public class MathPowVsRawMultiplyTest { private static final double VICTIM; static { VICTIM = new Random(System.currentTimeMillis()).nextDouble(); } double result; …
fge
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JMH: Perfomance comparison

I try to improve the perfomance of my program. I used JMH to comparate my two versions but I don't know if there are a real difference. Example of my results: Version1(op/s) score error(op/s) Version2 score…
lguerin
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Getting Java JMH in maven build from class directory

With the Java microbenchmark harness, I have a project that builds and installs fine depending on a jar of functions that i'm benchmarking. The benchmark code is still in the JMH directory created from maven. This is all fine. Here are the pom.xml…
JasonN
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