fast mergeArray function

steelbrain · Sep 24, 2020 · 96f48a9 · 96f48a9
1 parent 129959d
commit 96f48a9
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/lib/helpers.js b/lib/helpers.js
@@ -163,3 +163,9 @@ export function flagMessages(inputs: Array<Message>, cache: Map<string, Message>
 
   return { oldKept: Array.from(oldKept.values()), oldRemoved: Array.from(oldRemoved), newAdded: Array.from(newAdded) }
 }
+
+// fast mergeArray function
+// https://uilicious.com/blog/javascript-array-push-is-945x-faster-than-array-concat/
+export function mergeArray(arr1: Array, arr2: Array) {
+  Array.prototype.push.apply(arr1, arr2)
+}