benchmark

slfj4-caller-info-maven-plugin-benchmark

This maven project is for benchmarking Log4j2 and Logback performance of slf4j-caller-info-maven-plugin in comparison to using the caller location information in your logging pattern. The benchmarks are implemented with Java Microbenchmark Harness. All benchmarks are based on the log4j-perf module to be able to compare the here shown results with Log4j Performance.

Results

Runtime Performance

We can see a massive performance gain in comparison to using logback/log4j2 caller location pattern. Logging the caller location with this plugin speeds asynchronous logging by ~4 times. The actual slow down of logging the caller location with this plugin in comparison to not logging the caller at all is only ~8% (logback) and ~9% (log4j2). For more detailed JMH results analysis, you can view the .json result files (see results/) online with the JMH Visualizer.

Compilation Performance

As for the time it takes the inject goal to execute, the compilation time of the plugin is evaluated by generating Java projects with n classes, that all contain 5 SLF4J log-statements and running the plugin on these projects and averaging the plugin's execution time.

We can see that the plugin's execution time obviously goes up the more classes and SLF4J log statements there are in the source code, but even for a project with 10,000 classes the compilation time is only ~2 seconds.

Usage

Build the benchmarks.jar file for log4j, logback, compiletime modules:

mvn clean install

To run log4j2, logback, compiletime benchmarks:

java -jar log4j2/target/benchmarks.jar -rf json -rff results/jmh-results-log4j2.json ; \
java -jar logback/target/benchmarks.jar -rf json -rff results/jmh-results-logback.json ; \
java -jar compiletime/target/benchmarks.jar -rf json -rff results/jmh-results-compiletime.json

This project is licensed under the terms of the Apache 2.0 license.