From 221037f447741596cd71525f788cb1311172000f Mon Sep 17 00:00:00 2001
From: Bonomi Jacopo <jacopobonomi18@gmail.com>
Date: Mon, 20 Oct 2025 15:03:15 +0200
Subject: [PATCH 1/2] perf: lazy initialize ~standard schema property

---
 packages/zod/src/v4/core/schemas.ts | 39 +++++++++++++++++++++--------
 1 file changed, 28 insertions(+), 11 deletions(-)

diff --git a/packages/zod/src/v4/core/schemas.ts b/packages/zod/src/v4/core/schemas.ts
index 78cb4749f..8fd2787a5 100644
--- a/packages/zod/src/v4/core/schemas.ts
+++ b/packages/zod/src/v4/core/schemas.ts
@@ -301,18 +301,35 @@ export const $ZodType: core.$constructor<$ZodType> = /*@__PURE__*/ core.$constru
     };
   }
 
-  inst["~standard"] = {
-    validate: (value: unknown) => {
-      try {
-        const r = safeParse(inst, value);
-        return r.success ? { value: r.data } : { issues: r.error?.issues };
-      } catch (_) {
-        return safeParseAsync(inst, value).then((r) => (r.success ? { value: r.data } : { issues: r.error?.issues }));
-      }
+  // Lazy initialize ~standard to avoid creating objects for every schema
+  Object.defineProperty(inst, "~standard", {
+    get() {
+      const standardSchema = {
+        validate: (value: unknown) => {
+          try {
+            const r = safeParse(inst, value);
+            return r.success ? { value: r.data } : { issues: r.error?.issues };
+          } catch (_) {
+            return safeParseAsync(inst, value).then((r) =>
+              r.success ? { value: r.data } : { issues: r.error?.issues }
+            );
+          }
+        },
+        vendor: "zod",
+        version: 1 as const,
+      };
+      // Cache the result after first access
+      Object.defineProperty(this, "~standard", {
+        value: standardSchema,
+        writable: false,
+        enumerable: false,
+        configurable: false,
+      });
+      return standardSchema;
     },
-    vendor: "zod",
-    version: 1 as const,
-  };
+    enumerable: false,
+    configurable: true,
+  });
 });
 
 export { clone } from "./util.js";

From 6a7cdb180f45c6761c059c7049cc1c41210fcfc2 Mon Sep 17 00:00:00 2001
From: Colin McDonnell <colinmcd94@gmail.com>
Date: Thu, 6 Nov 2025 12:54:43 -0800
Subject: [PATCH 2/2] Use definelazy

---
 packages/zod/src/v4/core/schemas.ts | 38 +++++++++--------------------
 1 file changed, 11 insertions(+), 27 deletions(-)

diff --git a/packages/zod/src/v4/core/schemas.ts b/packages/zod/src/v4/core/schemas.ts
index 8fd2787a5..eb12129d1 100644
--- a/packages/zod/src/v4/core/schemas.ts
+++ b/packages/zod/src/v4/core/schemas.ts
@@ -302,34 +302,18 @@ export const $ZodType: core.$constructor<$ZodType> = /*@__PURE__*/ core.$constru
   }
 
   // Lazy initialize ~standard to avoid creating objects for every schema
-  Object.defineProperty(inst, "~standard", {
-    get() {
-      const standardSchema = {
-        validate: (value: unknown) => {
-          try {
-            const r = safeParse(inst, value);
-            return r.success ? { value: r.data } : { issues: r.error?.issues };
-          } catch (_) {
-            return safeParseAsync(inst, value).then((r) =>
-              r.success ? { value: r.data } : { issues: r.error?.issues }
-            );
-          }
-        },
-        vendor: "zod",
-        version: 1 as const,
-      };
-      // Cache the result after first access
-      Object.defineProperty(this, "~standard", {
-        value: standardSchema,
-        writable: false,
-        enumerable: false,
-        configurable: false,
-      });
-      return standardSchema;
+  util.defineLazy(inst, "~standard", () => ({
+    validate: (value: unknown) => {
+      try {
+        const r = safeParse(inst, value);
+        return r.success ? { value: r.data } : { issues: r.error?.issues };
+      } catch (_) {
+        return safeParseAsync(inst, value).then((r) => (r.success ? { value: r.data } : { issues: r.error?.issues }));
+      }
     },
-    enumerable: false,
-    configurable: true,
-  });
+    vendor: "zod",
+    version: 1 as const,
+  }));
 });
 
 export { clone } from "./util.js";