diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index 56792e584..75099f9d0 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "2.23.5",
+    "version": "2.23.6",
     "bin": "bin/hydrooj.js",
     "main": "dist/loader.js",
     "typings": "dist/loader.d.ts",
diff --git a/packages/hydrooj/src/model/builtin.ts b/packages/hydrooj/src/model/builtin.ts
index 0eb48def0..baad95f9c 100644
--- a/packages/hydrooj/src/model/builtin.ts
+++ b/packages/hydrooj/src/model/builtin.ts
@@ -255,19 +255,8 @@ PRIV.PRIV_DEFAULT = PRIV.PRIV_USER_PROFILE
     + PRIV.PRIV_CREATE_FILE
     + PRIV.PRIV_DELETE_FILE_SELF;
 
-// [10, 1] means that people whose rank is less than 1% will get Level 10
-export const LEVELS = [
-    [10, 1],
-    [9, 2],
-    [8, 10],
-    [7, 20],
-    [6, 30],
-    [5, 40],
-    [4, 70],
-    [3, 90],
-    [2, 95],
-    [1, 100],
-];
+// people whose rank is less than 1% will get Level 10
+export const LEVELS = [100, 90, 70, 55, 40, 30, 20, 10, 5, 2, 1];
 
 export const BUILTIN_USERS: Udoc[] = [
     {
diff --git a/packages/hydrooj/src/script/rating.ts b/packages/hydrooj/src/script/rating.ts
index 27f6125c6..fbb33bc99 100644
--- a/packages/hydrooj/src/script/rating.ts
+++ b/packages/hydrooj/src/script/rating.ts
@@ -84,36 +84,34 @@ async function runContest(...arg: any[]) {
 }
 
 export async function calcLevel(domainId: string, report: Function) {
-    const dudocs = await domain.getMultiUserInDomain(domainId).sort('rp', -1).toArray();
-    if (!dudocs.length) return;
+    const ducnt = await domain.getMultiUserInDomain(domainId).count();
+    if (!ducnt) return;
     let last = { rp: null };
     let rank = 0;
     let count = 0;
     const coll = global.Hydro.service.db.collection('domain.user');
+    const ducur = domain.getMultiUserInDomain(domainId).project({ rp: 1 }).sort({ rp: -1 });
     let bulk = coll.initializeUnorderedBulkOp();
-    for (const dudoc of dudocs) {
+    while (await ducur.hasNext()) {
+        const dudoc = await ducur.next();
         count++;
         if (!dudoc.rp) dudoc.rp = null;
         if (dudoc.rp !== last.rp) rank = count;
         bulk.find({ _id: dudoc._id }).updateOne({ $set: { rank } });
         last = dudoc;
-        if (count % 1000 === 0) report({ message: `#${count}: Rank ${rank}` });
+        if (count % 100 === 0) report({ message: `#${count}: Rank ${rank}` });
     }
     await bulk.execute();
-    if (!rank) {
-        report({ message: 'No one has rp' });
-        return;
-    }
     const levels = global.Hydro.model.builtin.LEVELS;
     bulk = coll.initializeUnorderedBulkOp();
     for (let i = 0; i < levels.length; i++) {
-        report({ message: 'Updating users levelled {0}'.format(levels[i][0]) });
+        report({ message: 'Updating users levelled {0}'.format(i) });
         const query: FilterQuery<Udoc> = {
             domainId,
-            $and: [{ rank: { $lte: (levels[i][1] * rank) / 100 } }],
+            $and: [{ rank: { $lte: (levels[i] * count) / 100 } }],
         };
-        if (i < levels.length - 1) query.$and.push({ rank: { $gt: (levels[i + 1][1] * rank) / 100 } });
-        bulk.find(query).update({ $set: { level: levels[i][0] } });
+        if (i < levels.length) query.$and.push({ rank: { $gt: (levels[i + 1] * count) / 100 } });
+        bulk.find(query).update({ $set: { level: i } });
     }
     await bulk.execute();
 }