Implement Microtask Delivery Queue

src/v8natives.js

Index: src/v8natives.js
diff --git a/src/v8natives.js b/src/v8natives.js
index b0b66e760b32118be5876b223a3292844a0ae439..b9f96df7002ff2538a4d61bec25321ae58f1396e 100644
--- a/src/v8natives.js
+++ b/src/v8natives.js
@@ -1904,10 +1904,15 @@ SetUpFunction();
 // Eventually, we should move to a real event queue that allows to maintain
 // relative ordering of different kinds of tasks.
 
-RunMicrotasks.runners = new InternalArray;
+RunMicrotasks.queue = new InternalArray;
 
 function RunMicrotasks() {
-  while (%SetMicrotaskPending(false)) {
-    for (var i in RunMicrotasks.runners) RunMicrotasks.runners[i]();
+  while (RunMicrotasks.queue.length) {
+    var microtasks = RunMicrotasks.queue;
+    RunMicrotasks.queue = new InternalArray;

[rafaelw, 2014/01/24 00:18:34]

I'm tempted to avoid allocating a new InternalArray for every pass here, and
instead just set queue.length = 0 at the end of the function.

I guess you'd need to protect against overflow within a single pass. What do you
think?

+
+    for (var i = 0; i < microtasks.length; i++) {
+      microtasks[i]();
+    }
   }
 }