Speed up object-keyed Map and Set by giving out sequential hash codes

src/math.js

Index: src/math.js
diff --git a/src/math.js b/src/math.js
index fc3bf2fcdabf1b4fd5b0083d4b9a219454e388b7..9f26f2ef50282b1695d27f3bc1039beac93dd85e 100644
--- a/src/math.js
+++ b/src/math.js
@@ -137,14 +137,6 @@ function MathRandom() {
   return (x < 0 ? (x + 0x100000000) : x) * 2.3283064365386962890625e-10;
 }
 
-function MathRandomRaw() {
-  var r0 = (MathImul(18030, rngstate[0] & 0xFFFF) + (rngstate[0] >>> 16)) | 0;
-  rngstate[0] = r0;
-  var r1 = (MathImul(36969, rngstate[1] & 0xFFFF) + (rngstate[1] >>> 16)) | 0;
-  rngstate[1] = r1;
-  var x = ((r0 << 16) + (r1 & 0xFFFF)) | 0;
-  return x & 0x3fffffff;
-}
 
 // ECMA 262 - 15.8.2.15
 function MathRound(x) {
@@ -366,7 +358,6 @@ utils.Export(function(to) {
   to.MathAbs = MathAbs;
   to.MathExp = MathExp;
   to.MathFloor = MathFloorJS;
-  to.IntRandom = MathRandomRaw;
   to.MathMax = MathMax;
   to.MathMin = MathMin;
 });