perf(*): Performance improvements (#3)

- Remove inner function
- Return early for primitive types
- Check Array before Buffer as this is both more common and faster

Author: Tom Atkinson

Diff for: index.js

@@ -14,46 +14,45 @@ module.exports = hasBinary;
 /**
  * Checks for binary data.
  *
- * Right now only Buffer and ArrayBuffer are supported..
+ * Supports Buffer, ArrayBuffer, Blob and File.
  *
  * @param {Object} anything
  * @api public
  */
 
-function hasBinary(data) {
+function hasBinary(obj) {
 
-  function _hasBinary(obj) {
-    if (!obj) return false;
+  if (!obj || typeof obj !== 'object') {
+    return false;
+  }
 
-    if ( (global.Buffer && global.Buffer.isBuffer && global.Buffer.isBuffer(obj)) ||
-         (global.ArrayBuffer && obj instanceof ArrayBuffer) ||
-         (global.Blob && obj instanceof Blob) ||
-         (global.File && obj instanceof File)
-        ) {
-      return true;
+  if (isArray(obj)) {
+    for (var i = 0, l = obj.length; i < l; i++) {
+       if (hasBinary(obj[i])) {
+         return true;
+       }
     }
+    return false;
+  }
 
-    if (isArray(obj)) {
-      for (var i = 0; i < obj.length; i++) {
-          if (_hasBinary(obj[i])) {
-              return true;
-          }
-      }
-    } else if (obj && 'object' == typeof obj) {
-      // see: https://github.com/Automattic/has-binary/pull/4
-      if (obj.toJSON && 'function' == typeof obj.toJSON) {
-        obj = obj.toJSON();
-      }
-
-      for (var key in obj) {
-        if (Object.prototype.hasOwnProperty.call(obj, key) && _hasBinary(obj[key])) {
-          return true;
-        }
-      }
-    }
+  if ( (global.Buffer && global.Buffer.isBuffer && global.Buffer.isBuffer(obj)) ||
+     (global.ArrayBuffer && obj instanceof ArrayBuffer) ||
+     (global.Blob && obj instanceof Blob) ||
+     (global.File && obj instanceof File)
+    ) {
+    return true;
+  }
 
-    return false;
+  // see: https://github.com/Automattic/has-binary/pull/4
+  if (obj.toJSON && 'function' == typeof obj.toJSON) {
+    obj = obj.toJSON();
+  }
+
+  for (var key in obj) {
+    if (Object.prototype.hasOwnProperty.call(obj, key) && hasBinary(obj[key])) {
+      return true;
+    }
   }
 
-  return _hasBinary(data);
+  return false;
 }