Optimize builtin lookup

skovhus · skovhus · commit b6aa819b4b17 · 2020-03-03T22:17:25.000+01:00
diff --git a/server/src/builtins.ts b/server/src/builtins.ts
@@ -63,8 +63,10 @@ export const LIST = [
   'wait',
 ]
 
+const SET = new Set(LIST)
+
 export function isBuiltin(word: string): boolean {
-  return LIST.find(builtin => builtin === word) !== undefined
+  return SET.has(word)
 }
 
 export async function documentation(builtin: string): Promise<string> {

Original file line number	Diff line number	Diff line change
`@@ -63,8 +63,10 @@ export const LIST = [`
`63`	`63`	`'wait',`
`64`	`64`	`]`
`65`	`65`
	`66`	`+const SET = new Set(LIST)`
	`67`	`+`
`66`	`68`	`export function isBuiltin(word: string): boolean {`
`67`		`- return LIST.find(builtin => builtin === word) !== undefined`
	`69`	`+ return SET.has(word)`
`68`	`70`	`}`
`69`	`71`
`70`	`72`	`export async function documentation(builtin: string): Promise<string> {`