optimize auto, parallel, and waterfall by not useing rest()

1 files changed, 7 insertions, 7 deletions

diff --git a/lib/auto.js b/lib/auto.js
index ba0fdc3..d712cc1 100644
--- a/lib/auto.js
+++ b/lib/auto.js
@@ -4,7 +4,7 @@ import indexOf from 'lodash/_baseIndexOf';
 import isArray from 'lodash/isArray';
 import okeys from 'lodash/keys';
 import noop from 'lodash/noop';
-import rest from './internal/rest';
+import slice from 'lodash/slice';
 
 import once from './internal/once';
 import onlyOnce from './internal/onlyOnce';
@@ -192,26 +192,26 @@ export default function (tasks, concurrency, callback) {
     function runTask(key, task) {
         if (hasError) return;
 
-        var taskCallback = onlyOnce(rest(function(err, args) {
+        var taskCallback = onlyOnce(function(err, result) {
             runningTasks--;
-            if (args.length <= 1) {
-                args = args[0];
+            if (arguments.length > 2) {
+                result = slice(arguments, 1);
             }
             if (err) {
                 var safeResults = {};
                 forOwn(results, function(val, rkey) {
                     safeResults[rkey] = val;
                 });
-                safeResults[key] = args;
+                safeResults[key] = result;
                 hasError = true;
                 listeners = Object.create(null);
 
                 callback(err, safeResults);
             } else {
-                results[key] = args;
+                results[key] = result;
                 taskComplete(key);
             }
-        }));
+        });
 
         runningTasks++;
         var taskFn = wrapAsync(task[task.length - 1]);