szeiger

szeiger@Stefans-MBP ~/code/dotty (master *=)
$ git clean -df
Removing dist-bootstrapped/
Removing dotty-bootstrapped/
Removing dotty-optimised/
Removing project/project/project/
Removing scala-compiler/
Removing scala-library/
Removing scala-reflect/
Removing scalap/

szeiger

[info] Benchmark                          (size)  (stringsOnly)  Mode  Cnt       Score       Error  Units
[info] HashMapBenchmark2.fill                  0          false  avgt   20      19.403 ±     0.136  ns/op
[info] HashMapBenchmark2.fill                  1          false  avgt   20      32.029 ±     0.360  ns/op
[info] HashMapBenchmark2.fill                 10          false  avgt   20     281.508 ±     3.443  ns/op
[info] HashMapBenchmark2.fill                100          false  avgt   20    6840.049 ±   119.193  ns/op
[info] HashMapBenchmark2.fill               1000          false  avgt   20   84998.278 ±  2454.868  ns/op
[info] HashMapBenchmark2.fill              10000          false  avgt   20  924593.503 ± 13564.179  ns/op
[info] HashMapBenchmark2.getExisting           0          false  avgt   20       0.631 ±     0.009  ns/op
[info] HashMapBenchmark2.getExisting           1          false  avgt   20      13.986 ±     0.299  ns/op
[info] HashMapBenchmark2.getExisting          10          false  avgt 

szeiger

import scala.collection.immutable.HashMap$;
import scala.collection.immutable.HashMap;
import scala.collection.immutable.Map;
import scala.collection.mutable.Builder;
import scala.Tuple2;

public class JavaCallingScalaHashMap {
    public static void main( String[] args ) {
        Map<String, Integer> hashMap = HashMap$.MODULE$.empty();

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[info] # Run progress: 91.67% complete, ETA 00:00:50
[info] # Fork: 2 of 2
[info] # Warmup Iteration   1: 94986.818 ns/op
[info] # Warmup Iteration   2: 90830.986 ns/op
[info] # Warmup Iteration   3: 90552.242 ns/op
[info] # Warmup Iteration   4: 93412.241 ns/op
[info] # Warmup Iteration   5: 90682.330 ns/op
[info] # Warmup Iteration   6: 92394.442 ns/op
[info] # Warmup Iteration   7: 95510.477 ns/op
[info] # Warmup Iteration   8: 92989.488 ns/op

szeiger

0394b8426ff src/library/scala/collection/immutable/LongMap.scala                                       (Aleksandar Prokopec 2010-07-09 11:31:34 +0000   1) /*                     __                                               *\
0394b8426ff src/library/scala/collection/immutable/LongMap.scala                                       (Aleksandar Prokopec 2010-07-09 11:31:34 +0000   2) **     ________ ___   / /  ___     Scala API                            **
807dbe557a4 src/library/scala/collection/immutable/LongMap.scala                                       (Heather Miller      2012-11-02 18:12:57 +0100   3) **    / __/ __// _ | / /  / _ |    (c) 2003-2013, LAMP/EPFL             **
0394b8426ff src/library/scala/collection/immutable/LongMap.scala                                       (Aleksandar Prokopec 2010-07-09 11:31:34 +0000   4) **  __\ \/ /__/ __ |/ /__/ __ |    http://scala-lang.org/               **
0394b8426ff src/library/scala/collection/immutable/LongMap.scala                                       (

szeiger

use std::ops::Add;

struct Point<T, U> { x: T, y: U }

impl<T : Add<Output=T>> Point<T, T> {
    fn f(self) -> T { self.x + self.y }
}

fn main() {
    Point { x: 1, y: 2.0 }.f();

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scala> def f[C[_], E]: List[C[E]] = Nil
warning: there was one feature warning; re-run with -feature for details
f: [C[_], E]=> List[C[E]]

scala> f[List, Int]
res5: List[List[Int]] = List()

scala> f[Any, Int]
res6: List[Any] = List()

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  public scala.Tuple2<java.lang.Object, java.lang.Object> find(int[][], int);
    Code:
       0: iconst_0
       1: istore_3
       2: iload_3
       3: aload_1
       4: arraylength
       5: if_icmpge     60
       8: aload_1
       9: iload_3

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def find(a: Array[Array[Int]], v: Int): (Int, Int) = {
  var i = 0
  while(i < a.length) {
    val aa = a(i)
    var j = 0
    while(j < aa.length) {
      if(aa(j) == v) return (i, j)
      j += 1
    }
    i += 1

szeiger

def find(a: Array[Array[Int]], v: Int): (Int, Int) = {
  var i = 0
  while(i < a.length) {
    val aa = a(i)
    var j = 0
    while(j < aa.length) {
      if(aa(j) == v) return (i, j)
      j += 1
    }
    i += 1