Don't make unnecessary getcwd calls from path.resolve

lib/path.js

@@ -47,16 +47,14 @@ if (isWindows) {
   // path.resolve([from ...], to)
   // windows version
   exports.resolve = function() {
-    // Prepend cwd to provided paths
-    var paths = [process.cwd()].concat(
-        Array.prototype.slice.call(arguments, 0));
-
     var resolvedDevice = '',
         resolvedTail = '',
         resolvedAbsolute = false;
 
-    for (var i = paths.length; i >= 0; i--) {
-      var path = paths[i];
+    for (var i = arguments.length; i >= -1; i--) {
+      var path = (i >= 0)
+          ? arguments[i]
+          : process.cwd();
 
       // Skip empty and invalid entries
       if (typeof path !== 'string' || !path) {
@@ -177,19 +175,19 @@ if (isWindows) {
   // path.resolve([from ...], to)
   // posix version
   exports.resolve = function() {
-    // Prepend cwd to provided paths
-    var paths = [process.cwd()].concat(
-        Array.prototype.slice.call(arguments, 0));
-
     var resolvedPath = '',
         resolvedAbsolute = false;
 
-    for (var i = paths.length; i >= 0 && !resolvedAbsolute; i--) {
-      var path = paths[i];
+    for (var i = arguments.length; i >= -1 && !resolvedAbsolute; i--) {
+      var path = (i >= 0)
+          ? arguments[i]
+          : process.cwd();
+
       // Skip empty and invalid entries
       if (typeof path !== 'string' || !path) {
         continue;
       }
+
       resolvedPath = path + '/' + resolvedPath;
       resolvedAbsolute = path.charAt(0) === '/';
     }