jmh Questions
2
Solved
I am benchmarking some methods using jmh through a spring boot application. When i run it through IDE it gives me benchmarks but when i package it with maven and run it through CMD it gives the bel...
Perpetua asked 21/8, 2018 at 15:30
11
Solved
I'm not able to run simple JMH benchmark inside eclipse.
Maven dependencies:
<dependency>
<groupId>org.openjdk.jmh</groupId>
<artifactId>jmh-core</artifactId>
<...
4
Solved
How can I run JMH benchmarks inside my existing project using JUnit tests? The official documentation recommends making a separate project, using Maven shade plugin, and launching JMH inside the ma...
2
Solved
I'm trying to get started with JMH under Eclipse. I can build a jar to execute from the command line but would also like me be able to run it directly within Eclipse for ease of development.
Curren...
1
Solved
I run sample JHM benchmark which suppose to show dead code elimination. Code is rewritten for conciseness from jhm github sample.
import org.openjdk.jmh.annotations.*;
import java.util.concurrent.T...
2
I try to benchmark some of the methods of my Spring (with maven) project. I need to use @Autowired and @Inject on several fields in my project. While I run my project, it works well. But JMH always...
Decide asked 4/5, 2017 at 9:14
1
I am trying to setup the very basic JMH test suite but I cannot get through to generate the jar with the tests... I have annotation processor on the classpath, with jmh core too, one simple class b...
1
Solved
The JLS states, that for arrays, "The enhanced for statement is equivalent to a basic for statement of the form". However if I check the generated bytecode for JDK8, for both variants dif...
4
I want to benchmark my application using JMH.
I am using JMH with gradle as build tool.
The github repository is here.
But whenever I run the application com.demo.aerospike.JMHAerospikeSpringData ...
4
Solved
I want to start have a look at JMH and I'm failing to run benchmarks due some reasons. Let me explain what I tried:
Setup a maven project in Eclipse
Define pom.xml like:
Downloaded some official...
Ginter asked 27/5, 2014 at 14:2
3
I'm new to jmh and to understanding what happens behind threads and so on.
So, I started reading and got stuck on the @State annotation and shared vs unshared states.
I read this example : http:/...
3
Solved
In my examples theoretically performance of 2 methods should be pretty similar. In the first case I use array, at the second - ArrayList with ensured capacity.
The results is the following:
Lesson...
Irfan asked 17/2, 2021 at 13:39
1
Solved
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...
Xuanxunit asked 15/1, 2021 at 18:35
3
Solved
I have a several heavy benchmark classes annotated with @Benchmark. After bulding jar with benchmarks I can run all of them with following command
java -Xmx4G -jar benchmarks.jar -f 1 -wi 3 -i 10
...
5
Solved
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...
1
I'm currently taking on a project where I'm measuring the speed of different types of loops in Java using the Java Microbenchmark Harness (JMH) framework. I got some interesting results regarding s...
Principe asked 9/8, 2019 at 5:32
2
Solved
I am bit surprised that the default (native) implementation of the hashCode() method appears ~50x slower than a simple override of the method for the following benchmark.
Consider a basic Book clas...
Maltz asked 16/11, 2020 at 0:49
1
Solved
I noticed that if else / ternary (condition ? a : b) assigment is faster than conditional assigment in if only statement. I performed JMH benchmarks on different JDKs but i will focus on JDK 12.
(o...
Handfast asked 7/9, 2020 at 20:30
1
I had an earlier question about interpreting JMH output, which was mostly answered, but I updated the question with another related question, but it would be better to have this be a separate quest...
Karlsruhe asked 26/3, 2019 at 21:34
1
Solved
I have a LinkedList of 1,000,000 items. I measured the retrieval of an item first at index 100,000 and then at index 900,000. In both cases, the LinkedList goes through 100,000 operations to get to...
Mailer asked 10/8, 2020 at 13:2
3
Solved
I have two case classes: addSmall and addBig.
addSmall contains only one field.
addBig contains several fields.
case class AddSmall(set: Set[Int] = Set.empty[Int]) {
def add(e: Int) = copy(set + ...
Edvard asked 21/2, 2020 at 14:47
2
I started to work with JMH lately and wondered if there is a possible way to debug it.
First thing I did was try to debug it like any other program, but it threw "No transports initialized", so I ...
3
If IIUC each fork creates a separate virtual machine for the reason that each virtual machine instance might run with slight differences in JIT instructions?
I'm also curious about what the time a...
Muscle asked 27/1, 2016 at 19:50
4
Solved
I have written some Scala code to perform an element-wise operation on a collection. Here I defined two methods that perform the same task. One method uses zip and the other uses zipped.
def ES (a...
Dysprosium asked 5/1, 2020 at 8:40
2
Solved
I wanted to compare performance of a direct byte buffer (java.nio.ByteBuffer, off-heap) and a heap buffer (achieved via array) for both read and writes. My understanding was, ByteBuffer being off-h...
Demarco asked 23/11, 2019 at 14:38
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