Improve performance of enum schema by caching values

Author: fabian-hiller

library/CHANGELOG.md

@@ -4,6 +4,7 @@ All notable changes to the library will be documented in this file.
 
 ## vX.X.X (Month DD, YYYY)
 
+- Improve performance of `enum_` and `enumAsync` schema by caching values
 - Fix bug in `getDefaults`, `getDefaultsAsync`, `getFallbacks` and `getFallbacksAsync` for falsy but not `undefined` values (issue #356)
 
 ## v0.25.0 (December 26, 2023)

library/src/schemas/enum/enum.ts

@@ -42,14 +42,21 @@ export function enum_<TEnum extends Enum>(
   enum_: TEnum,
   message: ErrorMessage = 'Invalid type'
 ): EnumSchema<TEnum> {
+  // Create cached values
+  let cachedValues: (string | number)[];
+
+  // Create and return enum schema
   return {
     type: 'enum',
     async: false,
     enum: enum_,
     message,
     _parse(input, info) {
+      // Cache values lazy
+      cachedValues = cachedValues || Object.values(this.enum);
+
       // Check type of input
-      if (!Object.values(this.enum).includes(input as any)) {
+      if (!cachedValues.includes(input as any)) {
         return schemaIssue(info, 'type', 'enum', this.message, input);
       }
 

library/src/schemas/enum/enumAsync.ts

@@ -35,14 +35,21 @@ export function enumAsync<TEnum extends Enum>(
   enum_: TEnum,
   message: ErrorMessage = 'Invalid type'
 ): EnumSchemaAsync<TEnum> {
+  // Create cached values
+  let cachedValues: (string | number)[];
+
+  // Create and return enum schema
   return {
     type: 'enum',
     async: true,
     enum: enum_,
     message,
     async _parse(input, info) {
+      // Cache values lazy
+      cachedValues = cachedValues || Object.values(this.enum);
+
       // Check type of input
-      if (!Object.values(this.enum).includes(input as any)) {
+      if (!cachedValues.includes(input as any)) {
         return schemaIssue(info, 'type', 'enum', this.message, input);
       }