Merge pull request scala#7265 from retronym/topic/hashityhash

Improve performance of HashMaps, Any.##

Author: adriaanm

src/library/scala/runtime/Statics.java

@@ -103,12 +103,20 @@ public static int anyHash(Object x) {
     if (x == null)
       return 0;
 
+    if (x instanceof java.lang.Number) {
+      return anyHashNumber((java.lang.Number) x);
+    }
+
+    return x.hashCode();
+  }
+
+  private static int anyHashNumber(Number x) {
     if (x instanceof java.lang.Long)
       return longHash(((java.lang.Long)x).longValue());
-
+  
     if (x instanceof java.lang.Double)
       return doubleHash(((java.lang.Double)x).doubleValue());
-
+  
     if (x instanceof java.lang.Float)
       return floatHash(((java.lang.Float)x).floatValue());