Merge pull request #3 from alexreardon/using-for-loop

Using for loop

src/are-inputs-equal.js

@@ -1,16 +1,21 @@
 // @flow
-const isShallowEqual = (newValue: mixed, oldValue: mixed): boolean =>
-  newValue === oldValue;
 
 export default function areInputsEqual(
   newInputs: mixed[],
   lastInputs: mixed[],
 ) {
-  return (
-    newInputs.length === lastInputs.length &&
-    newInputs.every(
-      (newArg: mixed, index: number): boolean =>
-        isShallowEqual(newArg, lastInputs[index]),
-    )
-  );
+  // no checks needed if the inputs length has changed
+  if (newInputs.length !== lastInputs.length) {
+    return false;
+  }
+  // Using for loop for speed. It generally performs better than array.every
+  // https://github.com/alexreardon/memoize-one/pull/59
+
+  for (let i = 0; i < newInputs.length; i++) {
+    // using shallow equality check
+    if (newInputs[i] !== lastInputs[i]) {
+      return false;
+    }
+  }
+  return true;
 }