Benchmark String Concatenation

The purpose of this project is to see the impact a different concatenation style

How use me

Clone repo and go inside

mvn clean install
java -jar target/string-concat-benchmarks.jar Main -f 1

Output result

Result :

Benchmark                     Mode  Cnt   Score   Error  Units
Main.concatWithConcat         avgt   10   2,311 ? 0,215  ms/op
Main.concatWithPlus           avgt   10   1,925 ? 0,226  ms/op
Main.concatWithStringBuilder  avgt   10   2,087 ? 0,286  ms/op
Main.concatWithStringFormat   avgt   10  12,275 ? 1,058  ms/op

We can see that String.format is not really a good way to concat strings