Java String Concatenation Performance: + vs StringBuilder
Java string concatenation performance on JDK 25 with JMH results, how + compiles since JEP 280, why += in loops is slow, and concat() vs StringBuilder.
JMH Java Microbenchmark Harness: Setup, Blackhole, Pitfalls
Learn the JMH Java Microbenchmark Harness with the Maven archetype, the Java 23+ processor fix, @State, @Param, Blackhole, real results and pitfalls.
JMeter Tutorial for Beginners: Load Test a REST API
Learn JMeter 5.6.3 step by step: build a test plan with a thread group, HTTP requests, an assertion and think time, run it in CLI mode and read the HTML report.
Spring Boot Dev Tools Tutorial
The Spring boot dev tools module provides a lot of useful developer features for improving the development experience such as caching static resources, automatic restarts, live reload, global settings and running the remote applications. 1. Enabling Dev Tools Module Enabling dev tools in the spring boot application is very easy. …
Practical Tips to Boost Performance of a Java Application
These tips will help you devise and follow a practical and measurable performance optimization plan for a Java application.
Iterate HashMap in Java: Fastest Way With JMH Results
Learn to iterate HashMap in Java with entrySet, forEach, keySet and streams, remove entries safely, and compare each way with JMH results on JDK 25.