== Spring Cloud Sleuth Benchmarks This module can run benchmarks using the following tools - JMH - JMeter === How to run it? In the root folder inside the `scripts` folder there are the following benchmark scripts: - runJmhBenchmark.sh - runJmeterBenchmarks.sh Just execute them from the root folder like this: [source] ---- ./scripts/runJmeterBenchmarks.sh ./scripts/runJmhBenchmarks.sh ---- === How do they work? For JMH we're building a shaded JAR file that is next executed. For JMeter we're running two applications, one with Sleuth, one without with Spring Boot Maven Plugin. Next a Maven JMeter plugin is executed that loads the `*.jmx` files, starts JMeter and prints out the results. At the end Spring Boot Maven Plugin stops the applications. === What are we testing? For now we're testing the performance impact of the following: - our custom Trace HTTP filter - instrumentation of controllers - `@Callable` returning and the sync one - instrumentation of RestTemplate - `@Async` annotated methods