* timing(fix): some performance improved (as previus some commits made code slower)

Author: dalisoft

API.md

@@ -45,7 +45,6 @@ Lightweight, effecient and modular ES6 version of tween.js
     * [.has(tween)](#TWEEN.has) ⇒ <code>Boolean</code>
     * [.remove(tween)](#TWEEN.remove)
     * [.update(time, [preserve])](#TWEEN.update)
-    * [.getTime()](#TWEEN.getTime) ⇒ <code>number</code> \| <code>Time</code>
     * [.isRunning()](#TWEEN.isRunning) ⇒ <code>Boolean</code>
 
 <a name="TWEEN.Plugins"></a>
@@ -87,7 +86,7 @@ Get browser/Node.js current time-stamp
 **Returns**: Normalised current time-stamp in milliseconds  
 **Example**  
 ```js
-TWEEN.now()
+TWEEN.now
 ```
 <a name="TWEEN.add"></a>
 
@@ -203,17 +202,6 @@ Updates global tweens by given time
 ```js
 TWEEN.update(500)
 ```
-<a name="TWEEN.getTime"></a>
-
-### TWEEN.getTime() ⇒ <code>number</code> \| <code>Time</code>
-Normalised tweens global time
-
-**Kind**: static method of [<code>TWEEN</code>](#TWEEN)  
-**Returns**: <code>number</code> \| <code>Time</code> - Normalised tweens global time  
-**Example**  
-```js
-TWEEN.getTime()
-```
 <a name="TWEEN.isRunning"></a>
 
 ### TWEEN.isRunning() ⇒ <code>Boolean</code>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "es6-tween",
-  "version": "3.8.14",
+  "version": "3.8.15",
   "description": "ES6 implementation of amazing tween.js",
   "browser": "full/Tween.min.js",
   "cdn": "full/Tween.min.js",

ts/Event.ts

@@ -23,7 +23,7 @@ class EventClass {
    */
   public on(event: string, callback: Function) {
     if (!this._events[event]) {
-      this._events[event] = []
+      this._events[event] = [] as Function[]
     }
 
     this._events[event].push(callback)
@@ -39,7 +39,7 @@ class EventClass {
    */
   public once(event: string, callback: Function) {
     if (!this._events[event]) {
-      this._events[event] = []
+      this._events[event] = [] as Function[]
     }
 
     const { _events } = this
@@ -65,7 +65,7 @@ class EventClass {
     }
 
     if (callback) {
-      this._events[event] = this._events[event].filter((cb) => cb !== callback)
+      this._events[event] = this._events[event].filter((cb: Function): boolean => cb !== callback)
     } else {
       this._events[event].length = 0
     }

ts/Timeline.ts

@@ -1,4 +1,4 @@
-import { add, now, remove, getTime } from './core'
+import { add, now, remove } from './core'
 import PlaybackPosition from './PlaybackPosition'
 import Tween, { EVENT_COMPLETE, EVENT_REPEAT, EVENT_REVERSE, EVENT_RS, EVENT_UPDATE } from './Tween'
 import Selector from './selector'
@@ -41,7 +41,7 @@ class Timeline extends Tween {
   constructor(params: Object) {
     super()
     this._duration = 0
-    this._startTime = now() - getTime()
+    this._startTime = now()
     this._tweens = []
     this._elapsed = 0
     this._id = _id++
@@ -197,7 +197,7 @@ class Timeline extends Tween {
   }
 
   public restart() {
-    this._startTime += now() - getTime()
+    this._startTime += now()
 
     add(this)
 

ts/Tween.ts

@@ -4,8 +4,7 @@ import {
   add,
   now,
   Plugins,
-  remove,
-  getTime
+  remove
 }
   from './core'
 import Easing from './Easing'
@@ -207,7 +206,7 @@ class Tween extends EventClass {
     this._isPlaying = false
 
     remove(this)
-    this._pausedTime = now() - getTime()
+    this._pausedTime = now()
 
     return this.emit(EVENT_PAUSE, this.object)
   }
@@ -224,9 +223,9 @@ class Tween extends EventClass {
 
     this._isPlaying = true
 
-    this._startTime += (now() - getTime()) - this._pausedTime
+    this._startTime += now() - this._pausedTime
     add(this)
-    this._pausedTime = now() - getTime()
+    this._pausedTime = now()
 
     return this.emit(EVENT_PLAY, this.object)
   }
@@ -239,7 +238,7 @@ class Tween extends EventClass {
    */
   public restart(noDelay?: boolean) {
     this._repeat = this._r
-    this._startTime = (now() - getTime()) + (noDelay ? 0 : this._delayTime)
+    this._startTime = now() + (noDelay ? 0 : this._delayTime)
 
     if (!this._isPlaying) {
       add(this)
@@ -256,7 +255,7 @@ class Tween extends EventClass {
    * @memberof Tween
    */
   public seek(time: number, keepPlaying?: boolean) {
-    this._startTime = (now() - getTime()) + Math.max(0, Math.min(
+    this._startTime = now() + Math.max(0, Math.min(
       time, this._duration))
 
     this.emit(EVENT_SEEK, time, this.object)
@@ -346,7 +345,7 @@ class Tween extends EventClass {
    * @memberof Tween
    */
   public start(time?: number) {
-    this._startTime = time !== undefined ? time : now() - getTime()
+    this._startTime = time !== undefined ? time : now()
     this._startTime += this._delayTime
 
     this._onStartCallbackFired = false
@@ -472,7 +471,7 @@ class Tween extends EventClass {
     } = this
 
     this._isPlaying = true
-    this._startTime = time !== undefined ? time : now() - getTime()
+    this._startTime = time !== undefined ? time : now()
     this._startTime += _delayTime
     add(this)
 
@@ -517,7 +516,7 @@ class Tween extends EventClass {
     let elapsed: number
     let currentEasing: Function
 
-    time = time !== undefined ? time : now() - getTime()
+    time = time !== undefined ? time : now()
 
     if (!_isPlaying || time < _startTime) {
       return true

ts/core.ts

@@ -8,7 +8,7 @@ declare let process: any
  * @return Normalised current time-stamp in milliseconds
  * @memberof TWEEN
  * @example
- * TWEEN.now()
+ * TWEEN.now
  */
 const now: any = (function () {
   if (typeof (process) !== 'undefined' && process.hrtime !== undefined) {
@@ -66,10 +66,9 @@ const add = (tween: any): void => {
   _tweens.push(tween)
 
   if (_autoPlay && !isStarted) {
+    lastTime = now()
     _tick = _ticker(update)
     isStarted = true
-    timeDiff += now() - lastTime
-    lastTime = now()
   }
 }
 
@@ -115,7 +114,7 @@ const removeAll = (): void => {
  * @example
  * TWEEN.get(tween)
  */
-const get = (tween: any): Function|null => {
+const get = (tween: any): Function | null => {
   for (let i: number = 0; i < _tweens.length; i++) {
     if (tween === _tweens[i]) {
       return _tweens[i]
@@ -162,7 +161,7 @@ const update = (time: number, preserve?: boolean): boolean => {
   time = time !== undefined ? time : now()
   delta = time - lastTime
   if (delta > 150) {
-    timeDiff += delta - frameMs
+    timeDiff = delta - frameMs
   }
   lastTime = time
   if (_autoPlay && isStarted) {
@@ -175,23 +174,23 @@ const update = (time: number, preserve?: boolean): boolean => {
     return false
   }
 
-  let i = 0
+  let i: number = 0
+  let tween: any
   while (i < _tweens.length) {
-    _tweens[i].update(time - timeDiff, preserve)
+    tween = _tweens[i]
+    if (timeDiff) {
+      tween._startTime += timeDiff
+    }
+    tween.update(time, preserve)
     i++
   }
+  if (timeDiff) {
+    timeDiff = 0
+  }
 
   return true
 }
 
-/**
- * Normalised tweens global time
- * @return {number|Time} Normalised tweens global time
- * @memberof TWEEN
- * @example TWEEN.getTime()
- */
-const getTime = (): number => timeDiff;
-
 /**
  * The state of ticker running
  * @return {Boolean} Status of running updates on all tweens
@@ -213,4 +212,4 @@ const isRunning = (): boolean => isStarted
  */
 const Plugins: Object = {}
 
-export { Plugins, get, getTime, has, getAll, removeAll, remove, add, now, update, autoPlay, onTick, isRunning }
+export { Plugins, get, has, getAll, removeAll, remove, add, now, update, autoPlay, onTick, isRunning }

ts/lite.ts

@@ -1,8 +1,7 @@
 import {
   add,
   now,
-  remove,
-  getTime
+  remove
 }
   from './core'
 import Easing from './Easing'
@@ -143,7 +142,7 @@ class Lite {
     this._isPlaying = false
 
     remove(this)
-    this._pausedTime = now() - getTime()
+    this._pausedTime = now()
 
     return this
   }
@@ -160,9 +159,9 @@ class Lite {
 
     this._isPlaying = true
 
-    this._startTime += (now() - getTime()) - this._pausedTime
+    this._startTime += now() - this._pausedTime
     add(this)
-    this._pausedTime = now() - getTime()
+    this._pausedTime = now()
 
     return this
   }
@@ -201,7 +200,7 @@ class Lite {
    * @memberof Lite
    */
   public start(time?: number) {
-    this._startTime = time !== undefined ? time : now() - getTime()
+    this._startTime = time !== undefined ? time : now()
     this._startTime += this._delayTime
 
     const {
@@ -436,7 +435,7 @@ class Lite {
     let value: number
     let property: string
 
-    time = time !== undefined ? time : now() - getTime()
+    time = time !== undefined ? time : now()
 
     if (!_isPlaying || time < _startTime) {
       return true