Scala Native Sample
Configuration
You may need to configure build.sbt to set the path to clang and clang++.
nativeMode := "release"
nativeClang := file("/usr/local/Cellar/llvm/4.0.0/bin/clang")
nativeClangPP := file("/usr/local/Cellar/llvm/4.0.0/bin/clang++")
Fibonacci number (50 th)
Run on MBP (2.5GHz Intel Core i5)
| Naive | Tail call | Mutual tail call | |
|---|---|---|---|
| Scala Native | 103.52 secs | 0.034 msecs | 38.88 secs |
| JVM | 75.58 secs | 0.430 msecs | 69.88 secs |
Scala Native
$ sbt compile nativeLink
...
$ time target/scala-2.11/scala-native-example-out 50
Naive fibonacci: 12586269025
Time: 103517377024 ns
Tail call fibonacci: 12586269025
Time: 34048 ns
Mutual tail call fibonacci: 12586269025
Time: 38880023040 ns
real 2m22.424s
user 2m22.243s
sys 0m0.060s
Scala on JVM
# disable "enablePlugins(ScalaNativePlugin)" in build.sbt
$ sbt assembly
...
$ time java -jar target/scala-2.11/scala-native-example-assembly-0.1.0.jar 50
Naive fibonacci: 12586269025
Time: 75578138895 ns
Tail call fibonacci: 12586269025
Time: 429532 ns
Mutual tail call fibonacci: 12586269025
Time: 69880392492 ns
real 2m25.778s
user 2m25.700s
sys 0m0.164s