small speed improvements by reducing nextTick calls for most reporters

lib/types.js

@@ -106,9 +106,11 @@ exports.test = function (name, start, options, callback) {
 
     var wrapAssert = assertWrapper(function (a) {
         a_list.push(a);
-        async.nextTick(function () {
-            options.log(a);
-        });
+        if (options.log) {
+            async.nextTick(function () {
+                options.log(a);
+            });
+        }
     });
 
     var test = {
@@ -120,16 +122,20 @@ exports.test = function (name, start, options, callback) {
                 );
                 var a1 = exports.assertion({method: 'expect', error: e});
                 a_list.push(a1);
-                async.nextTick(function () {
-                    options.log(a1);
-                });
+                if (options.log) {
+                    async.nextTick(function () {
+                        options.log(a1);
+                    });
+                }
             }
             if (err) {
                 var a2 = exports.assertion({error: err});
                 a_list.push(a2);
-                async.nextTick(function () {
-                    options.log(a2);
-                });
+                if (options.log) {
+                    async.nextTick(function () {
+                        options.log(a2);
+                    });
+                }
             }
             var end = new Date().getTime();
             async.nextTick(function () {
@@ -173,7 +179,7 @@ exports.options = function (opt) {
     optionalCallback('moduleDone');
     optionalCallback('testStart');
     optionalCallback('testDone');
-    optionalCallback('log');
+    //optionalCallback('log');
 
     // 'done' callback is not optional.