perf: expose internal api too KaboomCtx, avoid Array.find

src/kaboom.ts

@@ -160,6 +160,7 @@ import type {
     GfxFont,
     HealthComp,
     ImageSource,
+    InternalCtx,
     KaboomCtx,
     KaboomOpt,
     KaboomPlugin,
@@ -281,13 +282,7 @@ function createEmptyAudioBuffer(ctx: AudioContext) {
     return ctx.createBuffer(1, 1, 44100);
 }
 
-type InternalContext = {
-    kaboomCtx: KaboomCtx;
-    getViewportScale: () => number;
-};
-
 let ctx: KaboomCtx;
-let internalCtx: InternalContext[] = [];
 
 // TODO: A better way to detect KaboomCtx
 export const isKaboomCtx = (obj: any): obj is KaboomCtx => {
@@ -308,8 +303,8 @@ export const getKaboomContext = (fallBack?: any): KaboomCtx => {
     return ctx;
 };
 
-export const getInternalContext = (kaboom: KaboomCtx): InternalContext => {
-    return internalCtx.find((ctx) => ctx.kaboomCtx === kaboom);
+export const getInternalContext = (kaboom: KaboomCtx): InternalCtx => {
+    return kaboom._k;
 };
 
 // only exports one kaboom() which contains all the state
@@ -6615,9 +6610,14 @@ export default (gopt: KaboomOpt = {}): KaboomCtx => {
 
     updateViewport();
     initEvents();
+    const internalCtx = {
+        kaboomCtx: ctx,
+        getViewportScale,
+    };
 
     // the exported ctx handle
     ctx = {
+        _k: internalCtx,
         VERSION,
         // asset load
         loadRoot,
@@ -6886,11 +6886,6 @@ export default (gopt: KaboomOpt = {}): KaboomCtx => {
         EventController,
     };
 
-    internalCtx.push({
-        kaboomCtx: ctx,
-        getViewportScale,
-    });
-
     if (gopt.plugins) {
         gopt.plugins.forEach(plug);
     }

src/types.ts

@@ -36,12 +36,23 @@ declare function kaboom<T extends PluginList<unknown> = [undefined]>(
     options?: KaboomOpt<T>,
 ): T extends [undefined] ? KaboomCtx : KaboomCtx & MergePlugins<T>;
 
+export type InternalCtx = {
+    kaboomCtx: KaboomCtx;
+    getViewportScale: () => number;
+};
+
 /**
  * Context handle that contains every kaboom function.
  *
  * @group Start
  */
 export interface KaboomCtx {
+    /**
+     * The internal context object.
+     *
+     * @private
+     */
+    _k: InternalCtx;
     /**
 	 * Assemble a game object from a list of components, and add it to the game
 	 *