From a4c0f393e6bee7585d8203a5478bda06f77c742a Mon Sep 17 00:00:00 2001
From: Matthias Schwarz <70815012+matthiasschwarz@users.noreply.github.com>
Date: Mon, 9 Sep 2024 20:47:33 +0200
Subject: [PATCH] perf(ajv): reuse compiled schema

---
 README.md      |  6 +++---
 ajv/src/ajv.ts | 44 ++++++++++++++++++++++++--------------------
 2 files changed, 27 insertions(+), 23 deletions(-)

diff --git a/README.md b/README.md
index 07a0362f..de9a9b0e 100644
--- a/README.md
+++ b/README.md
@@ -465,14 +465,14 @@ const schema = {
   additionalProperties: false,
 };
 
+const resolver = ajvResolver(schema);
+
 const App = () => {
   const {
     register,
     handleSubmit,
     formState: { errors },
-  } = useForm({
-    resolver: ajvResolver(schema),
-  });
+  } = useForm({ resolver });
 
   return (
     <form onSubmit={handleSubmit((data) => console.log(data))}>
diff --git a/ajv/src/ajv.ts b/ajv/src/ajv.ts
index 19146a13..62f67bfd 100644
--- a/ajv/src/ajv.ts
+++ b/ajv/src/ajv.ts
@@ -45,28 +45,31 @@ const parseErrorSchema = (
   }, {});
 };
 
-export const ajvResolver: Resolver =
-  (schema, schemaOptions, resolverOptions = {}) =>
-  async (values, _, options) => {
-    const ajv = new Ajv(
-      Object.assign(
-        {},
-        {
-          allErrors: true,
-          validateSchema: true,
-        },
-        schemaOptions,
-      ),
-    );
+export const ajvResolver: Resolver = (
+  schema,
+  schemaOptions,
+  resolverOptions = {},
+) => {
+  const ajv = new Ajv(
+    Object.assign(
+      {},
+      {
+        allErrors: true,
+        validateSchema: true,
+      },
+      schemaOptions,
+    ),
+  );
+
+  ajvErrors(ajv);
 
-    ajvErrors(ajv);
+  const modifiedSchema = Object.assign(
+    { $async: resolverOptions && resolverOptions.mode === 'async' },
+    schema,
+  );
 
-    const validate = ajv.compile(
-      Object.assign(
-        { $async: resolverOptions && resolverOptions.mode === 'async' },
-        schema,
-      ),
-    );
+  return async (values, _, options) => {
+    const validate = ajv.compile(modifiedSchema);
 
     const valid = validate(values);
 
@@ -86,3 +89,4 @@ export const ajvResolver: Resolver =
           ),
         };
   };
+};