From 7ed64cbc9c55f2d5a545d18f2e95688d63cae0e7 Mon Sep 17 00:00:00 2001
From: Yichi Zhang <yichizhng@gmail.com>
Date: Thu, 23 May 2024 00:41:52 -0700
Subject: [PATCH] Improve performance of checker for valid math contracts
 (#1286)

---
 src/data/codingcontracttypes.ts | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/data/codingcontracttypes.ts b/src/data/codingcontracttypes.ts
index e17ec243c..40d62cdc2 100644
--- a/src/data/codingcontracttypes.ts
+++ b/src/data/codingcontracttypes.ts
@@ -1282,8 +1282,9 @@ export const codingContractTypesMetadata: ICodingContractTypeMetadata[] = [
       // Prevent player from providing extra wrong answers and still receiving credit
       if (result.length !== sanitizedPlayerAnsArr.length) return false;
 
-      for (const expr of result) {
-        if (!sanitizedPlayerAnsArr.includes(expr)) {
+      const resultsSet = new Set(result);
+      for (const expr of sanitizedPlayerAnsArr) {
+        if (!resultsSet.has(expr)) {
           return false;
         }
       }