Reland: Use simple/fast inline function version of MinMax in JS

src/js/runtime.js

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This files contains runtime support implemented in JavaScript.
 
 // CAUTION: Some of the functions specified in this file are called
 // directly from compiled code. These are the functions with names in
 // ALL CAPS. The compiled code passes the first argument in 'this'.
 
@@ skipping 202 matching lines @@
   return TO_BOOLEAN(spreadable);
 }
 
 
 function ToPositiveInteger(x, rangeErrorIndex) {
   var i = TO_INTEGER_MAP_MINUS_ZERO(x);
   if (i < 0) throw MakeRangeError(rangeErrorIndex);
   return i;
 }
 
+
+function MaxSimple(a, b) {
+  return a > b ? a : b;
+}
+
+
+function MinSimple(a, b) {
+  return a > b ? b : a;
+}
+
+
+%SetForceInlineFlag(MaxSimple);

[Jakob Kummerow, 2015/10/15 14:18:48]

Have you measured that this actually makes a difference, or are you just
guessing?

[skomski, 2015/10/15 15:17:58]

Measured and definitely makes a big difference >9%.

+%SetForceInlineFlag(MinSimple);
+
 //----------------------------------------------------------------------------
 
 // NOTE: Setting the prototype for Array must take place as early as
 // possible due to code generation for array literals.  When
 // generating code for a array literal a boilerplate array is created
 // that is cloned when running the code.  It is essential that the
 // boilerplate gets the right prototype.
 %FunctionSetPrototype(GlobalArray, new GlobalArray(0));
 
 // ----------------------------------------------------------------------------
 // Exports
 
 $sameValue = SameValue;
 $sameValueZero = SameValueZero;
 
 utils.Export(function(to) {
   to.ToPositiveInteger = ToPositiveInteger;
+  to.MaxSimple = MaxSimple;
+  to.MinSimple = MinSimple;
 });
 
 %InstallToContext([
   "apply_prepare_builtin", APPLY_PREPARE,
   "concat_iterable_to_array_builtin", CONCAT_ITERABLE_TO_ARRAY,
   "reflect_apply_prepare_builtin", REFLECT_APPLY_PREPARE,
   "reflect_construct_prepare_builtin", REFLECT_CONSTRUCT_PREPARE,
 ]);
 
 %InstallToContext([
   "concat_iterable_to_array", ConcatIterableToArray,
 ]);
 
 })