Optimize getTexture func

src/shared/getTexture.ts

@@ -1,10 +1,17 @@
 import isNumber from '../util/isNumber';
 
 import { ISchema } from '../types/schema';
+import { SchemaEnum } from 'tf2-static-schema';
 
-const TEXTURE_EXCEPTIONS = [
-	['Health and Hell', 'Health and Hell (Green)'],
-];
+const TEXTURE_EXCEPTIONS = [['Health and Hell', 'Health and Hell (Green)']];
+
+//cache the textureKeys since Object.keys() is expensive
+let isTextureKeysCached = false;
+let textureKeys: string[] = [];
+
+//cache a stripped version of textures
+let isTexturesCached = false;
+let textures: SchemaEnum = {};
 
 /**
  * Iterates over effects object to get matching effect.
@@ -14,26 +21,41 @@ export default function (
 	name: string,
 	attributes: { wear: any | null; schema: ISchema }
 ): string | void {
-	const textures = attributes.schema.getTextures();
-	const textureKeys = Object.keys(textures);
-	for (let i = 0; i < textureKeys.length; i++) {
-		const texture: number | string = textureKeys[i];
+	if (!isTexturesCached) {
+		const copysrc = attributes.schema.getTextures();
 
-		if (
-			texture === 'Haunted Ghosts' &&
-			name.includes('Haunted Ghosts') &&
-			!attributes.wear
-		) {
-			continue;
+		//strip away all properties with numeric keys
+		//we must also copy this object, as we don't want to modify the original
+		const keys = Object.keys(copysrc);
+		for (const key of keys) {
+			if (!isNumber(key)) {
+				textures[key] = copysrc[key];
+			}
 		}
 
-		for (let j = 0; j < TEXTURE_EXCEPTIONS.length; j++) {
-			const exception = TEXTURE_EXCEPTIONS[j];
-			if (texture === exception[0] && name.includes(`${exception[1]} `))
-				return exception[1];
+		isTexturesCached = true;
+	}
+	if (!isTextureKeysCached) {
+		textureKeys = Object.keys(textures);
+		isTextureKeysCached = true;
+	}
+
+	for (let j = 0; j < TEXTURE_EXCEPTIONS.length; j++) {
+		const exception = TEXTURE_EXCEPTIONS[j];
+		if (name.includes(`${exception[1]} `)) return exception[1];
+	}
+
+	const skipHauntedFlag = name.includes('Haunted Ghosts') && !attributes.wear;
+
+	for (let i = 0; i < textureKeys.length; i++) {
+		const texture = textureKeys[i];
+
+		if (!name.includes(`${texture} `)) {
+			// eslint-disable-next-line no-continue
+			continue;
 		}
 
-		if (isNumber(texture) || !name.includes(`${texture} `)) {
+		if (texture === 'Haunted Ghosts' && skipHauntedFlag) {
 			// eslint-disable-next-line no-continue
 			continue;
 		}