henri-tremblay / Java8vsJava17Performance

Java 8 vs Java 17 performance. Modern does not mean faster.

Why migrate to Java 17? Not because of its performance.

Sample code for my post comparing performance of Java 8 and Java 17.

I am using Java 1.8.0_302 and 17.0.1.

Fibonacci

Comes from this article.

Usage

• Compile with mvn clean verify using Java 8 or Java 17
• Run java -cp target/startJetty.jar com.acme.performance.Main 40 100 to replay the example in the article
• Run java -jar target/benchmarks.jar to run the JMH equivalent

Results

My current results are

Main

| | Java 8 | Java 17 | |one | 328.17 | 343.36 | |multi | 60.18 | 66.10 |

JMH

Java 17
Benchmark           Mode  Cnt    Score   Error  Units
MyBenchmark.fibPar  avgt   20   82.433 ± 2.607  ms/op
MyBenchmark.fibSeq  avgt   20  356.393 ± 0.601  ms/op

Java 8
Benchmark           Mode  Cnt    Score   Error  Units
MyBenchmark.fibPar  avgt   20   71.610 ± 3.832  ms/op
MyBenchmark.fibSeq  avgt   20  326.094 ± 0.536  ms/op