linkedin#52

linkedin#52:  Adding constant

Author: SparshithNR

src/metal/engine.ts

@@ -12,11 +12,13 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 import { EngineInterface } from './interfaces';
 import W from './window-proxy';
 
+const NUM_SKIPPED_FRAMES = 4;
+
 export class Engine implements EngineInterface {
   private reads: Array<Function> = [];
   private work: Array<Function> = [];
   private running: Boolean = false;
-  private skipCounter: number = 4;
+  private skipCounter: number = NUM_SKIPPED_FRAMES;
   scheduleRead(callback: Function) {
     this.reads.unshift(callback);
     this.run();
@@ -29,7 +31,7 @@ export class Engine implements EngineInterface {
     if (!this.running) {
       this.running = true;
       W.rAF(() => {
-        if (this.skipCounter > 3) {
+        if (this.skipCounter > NUM_SKIPPED_FRAMES - 1) {
           this.skipCounter = 0;
           for (let i = 0, rlen = this.reads.length; i < rlen; i++) {
             this.reads.pop()();