map and set perf

gistfile1.diff

diff --git a/deps/v8/src/collection.js b/deps/v8/src/collection.js
index 6d43384..b6a4c19 100644
--- a/deps/v8/src/collection.js
+++ b/deps/v8/src/collection.js
@@ -179,8 +179,7 @@ function SetAdd(key) {
   var chainEntry = ORDERED_HASH_TABLE_BUCKET_AT(table, bucket);
   ORDERED_HASH_TABLE_SET_BUCKET_AT(table, bucket, entry);
   ORDERED_HASH_TABLE_SET_ELEMENT_COUNT(table, nof + 1);
-  FIXED_ARRAY_SET(table, index, key);
-  FIXED_ARRAY_SET_SMI(table, index + 1, chainEntry);
+  FIXED_ARRAY_SET_TWO(table, index, key, index + 1, chainEntry);
   return this;
 }
 
@@ -369,9 +368,8 @@ function MapSet(key, value) {
   var chainEntry = ORDERED_HASH_TABLE_BUCKET_AT(table, bucket);
   ORDERED_HASH_TABLE_SET_BUCKET_AT(table, bucket, entry);
   ORDERED_HASH_TABLE_SET_ELEMENT_COUNT(table, nof + 1);
-  FIXED_ARRAY_SET(table, index, key);
-  FIXED_ARRAY_SET(table, index + 1, value);
-  FIXED_ARRAY_SET(table, index + 2, chainEntry);
+  FIXED_ARRAY_SET_THREE(table, index, key, index + 1, value, 
+    index + 2, chainEntry);
   return this;
 }
 
diff --git a/deps/v8/src/macros.py b/deps/v8/src/macros.py
index 49b2cad..f67dc45 100644
--- a/deps/v8/src/macros.py
+++ b/deps/v8/src/macros.py
@@ -278,6 +278,8 @@ define ITERATOR_KIND_ENTRIES = 3;
 
 macro FIXED_ARRAY_GET(array, index) = (%_FixedArrayGet(array, (index) | 0));
 macro FIXED_ARRAY_SET(array, index, value) = (%_FixedArraySet(array, (index) | 0, value));
+macro FIXED_ARRAY_SET_TWO(array, i1, v1, i2, v2) = (%_FixedArraySetTwo(array, (i1) | 0, v1, i2, (v2) | 0));
+macro FIXED_ARRAY_SET_THREE(array, i1, v1, i2, v2, i3, v3) = (%_FixedArraySetThree(array, (i1) | 0, v1, (i2) | 0, v2, (i3) | 0, v3));
 # TODO(adamk): Find a more robust way to force Smi representation.
 macro FIXED_ARRAY_SET_SMI(array, index, value) = (FIXED_ARRAY_SET(array, index, (value) | 0));
 
diff --git a/deps/v8/src/runtime/runtime-array.cc b/deps/v8/src/runtime/runtime-array.cc
index fa0d91b..1dacf8f 100644
--- a/deps/v8/src/runtime/runtime-array.cc
+++ b/deps/v8/src/runtime/runtime-array.cc
@@ -77,6 +77,37 @@ RUNTIME_FUNCTION(Runtime_FixedArraySet) {
 }
 
 
+RUNTIME_FUNCTION(Runtime_FixedArraySetTwo) {
+  SealHandleScope shs(isolate);
+  DCHECK(args.length() == 5);
+  CONVERT_ARG_CHECKED(FixedArray, object, 0);
+  CONVERT_SMI_ARG_CHECKED(index, 1);
+  CONVERT_ARG_CHECKED(Object, value, 2);
+  CONVERT_SMI_ARG_CHECKED(index2, 3);
+  CONVERT_ARG_CHECKED(Object, value2, 4);
+  object->set(index, value);
+  object->set(index2, value2);
+  return isolate->heap()->undefined_value();
+}
+
+
+RUNTIME_FUNCTION(Runtime_FixedArraySetThree) {
+  SealHandleScope shs(isolate);
+  DCHECK(args.length() == 7);
+  CONVERT_ARG_CHECKED(FixedArray, object, 0);
+  CONVERT_SMI_ARG_CHECKED(index, 1);
+  CONVERT_ARG_CHECKED(Object, value, 2);
+  CONVERT_SMI_ARG_CHECKED(index2, 3);
+  CONVERT_ARG_CHECKED(Object, value2, 4);
+  CONVERT_SMI_ARG_CHECKED(index3, 5);
+  CONVERT_ARG_CHECKED(Object, value3, 6);
+  object->set(index, value);
+  object->set(index2, value2);
+  object->set(index3, value3);
+  return isolate->heap()->undefined_value();
+}
+
+
 RUNTIME_FUNCTION(Runtime_TransitionElementsKind) {
   HandleScope scope(isolate);
   RUNTIME_ASSERT(args.length() == 2);
diff --git a/deps/v8/src/runtime/runtime.h b/deps/v8/src/runtime/runtime.h
index 4545426..69e80ae 100644
--- a/deps/v8/src/runtime/runtime.h
+++ b/deps/v8/src/runtime/runtime.h
@@ -50,6 +50,8 @@ namespace internal {
   F(GetCachedArrayIndex, 1, 1)              \
   F(FixedArrayGet, 2, 1)                    \
   F(FixedArraySet, 3, 1)                    \
+  F(FixedArraySetTwo, 5, 1)                 \
+  F(FixedArraySetThree, 7, 1)               \
   F(FastOneByteArrayJoin, 2, 1)
 
 

map.js

var phr = require('phr')

var h = process.hrtime()

for (var i = 0; i < 1e6; i++) {
  var m = new Map()
  m.set('a', '1')
  m.set('b', '2')
}

h = process.hrtime(h)

console.log('bench', phr(h), 'ns/op')

results.txt

Map

before: 380.5 ns/op
after:  189.9 ns/op

Set

before: 343.7 ns/op
after:  179.8 ns/op

set.js

var phr = require('phr')

var h = process.hrtime()

for (var i = 0; i < 1e6; i++) {
  var m = new Set()
  m.add('1')
  m.add('2')
}

h = process.hrtime(h)

console.log('bench', phr(h), 'ns/op')