From 1ca93939e97ee7f2a625496563b8523c16424198 Mon Sep 17 00:00:00 2001
From: sinclair <haydn.developer@gmail.com>
Date: Tue, 17 Oct 2023 22:47:33 +0900
Subject: [PATCH] Optimize Union Encode Check

---
 src/value/transform.ts | 19 +++++++++----------
 1 file changed, 9 insertions(+), 10 deletions(-)

diff --git a/src/value/transform.ts b/src/value/transform.ts
index 5e278bfd9..281917f18 100644
--- a/src/value/transform.ts
+++ b/src/value/transform.ts
@@ -403,20 +403,19 @@ export namespace EncodeTransform {
     return IsArray(schema.items) ? schema.items.map((schema, index) => Visit(schema, references, value1[index])) : []
   }
   function TUnion(schema: Types.TUnion, references: Types.TSchema[], value: any) {
-    const value1 = Default(schema, value)
-    // encoded union pass
+    // test value against union variants
     for (const subschema of schema.anyOf) {
-      if (!checkFunction(subschema, references, value1)) continue
-      const value2 = Visit(subschema, references, value)
-      return Default(schema, value2)
+      if (!checkFunction(subschema, references, value)) continue
+      const value1 = Visit(subschema, references, value)
+      return Default(schema, value1)
     }
-    // non-encoded union pass
+    // test transformed value against union variants
     for (const subschema of schema.anyOf) {
-      const value2 = Visit(subschema, references, value)
-      if (!checkFunction(schema, references, value2)) continue
-      return Default(schema, value2)
+      const value1 = Visit(subschema, references, value)
+      if (!checkFunction(schema, references, value1)) continue
+      return Default(schema, value1)
     }
-    return value1
+    return Default(schema, value)
   }
   function Visit(schema: Types.TSchema, references: Types.TSchema[], value: any): any {
     const references_ = typeof schema.$id === 'string' ? [...references, schema] : references