From 8ca438f245a45186626f4f5b34d1ed7473667c0e Mon Sep 17 00:00:00 2001
From: Ru Chern Chong <hello@ruchern.xyz>
Date: Wed, 13 Dec 2023 01:59:21 +0800
Subject: [PATCH] Speed up computation

---
 packages/core/src/datasets.ts | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/packages/core/src/datasets.ts b/packages/core/src/datasets.ts
index abc3825..d3f558f 100644
--- a/packages/core/src/datasets.ts
+++ b/packages/core/src/datasets.ts
@@ -48,11 +48,11 @@ export const updater = async () => {
     const result = await db.collection("cars").insertMany(parsedData);
     console.log(`${result.insertedCount} document(s) inserted`);
   } else {
+    const existingDataMap = new Map(
+      existingData.map((item) => [item.month, item]),
+    );
     const newDataToInsert = parsedData.filter(
-      (newItem) =>
-        !existingData.some(
-          (existingItem) => existingItem.month === newItem.month,
-        ),
+      (newItem) => !existingDataMap.has(newItem.month),
     );
 
     if (newDataToInsert.length > 0) {