/playground-kotlin-compile-performance

Primary LanguageKotlin

$ ./gradlew compareKotlinCompile

What I found out

info: kotlinc-jvm 1.6.10 (JRE 11.0.12+8-LTS-237)
  • Specifying the type of variable does not change the compilation time.
    • val a = 1
    • val a: Int = 1
  • Explicitly specifying type parameters for generic functions slightly speeds up the compilation time. However, since unnecessary type parameters are specified, a warning will appear.
    • val a = listOf(1, 2).map { it * 2.0 }.reduce(Double::plus)
    • val a = listOf<Int>(1, 2).map<Int, Double> { it * 2.0 }.reduce<Double, Double>(Double::plus)