prefer setImmediate over setTimeout, and don't use process.nextTick in

Promise

Author: aisk

lib/promise.js

@@ -412,14 +412,12 @@
         func.call();
       };
       if (AV.Promise._isPromisesAPlusCompliant) {
-        if (typeof(window) !== 'undefined' && window.setTimeout) {
+        if (typeof(setImmediate) !== 'undefined' && _.isFunction(setImmediate)) {
+          runLater = setImmediate;
+        } else if (typeof(setTimeout) !== 'undefined' && _.isFunction(setTimeout)) {
           runLater = function(func) {
-            window.setTimeout(func, 0);
-          };
-        } else if (typeof(process) !== 'undefined' && process.nextTick) {
-          runLater = function(func) {
-            process.nextTick(func);
-          };
+            window.setImmediate(func);
+          }
         }
       }
 

test/promise.js

@@ -162,7 +162,7 @@ describe('promise', function() {
         expect(errors[2]).to.be(64);
         expect(errors[3]).to.be(128);
         //should be 128 ms
-        expect(Date.now() - startDate).to.be.within(125,140);
+        expect(Date.now() - startDate).to.be.within(125, 145);
 
         done();
      }).done(function(ret){
@@ -181,7 +181,7 @@ describe('promise', function() {
      ]).catch(function (error) {
         expect(error).to.be(1);
         //should be 1 ms
-        expect(Date.now() - startDate).to.be.within(0,5);
+        expect(Date.now() - startDate).to.be.within(0, 10);
         setTimeout(done, 500);
      }).done(function(ret){
         throw ret;