diff --git a/packages/hydrooj/src/handler/contest.ts b/packages/hydrooj/src/handler/contest.ts
index ea8eb6780..7515c8477 100644
--- a/packages/hydrooj/src/handler/contest.ts
+++ b/packages/hydrooj/src/handler/contest.ts
@@ -193,10 +193,9 @@ export class ContestBroadcastHandler extends ContestDetailBaseHandler {
 
 export class ContestScoreboardHandler extends ContestDetailBaseHandler {
     @param('tid', Types.ObjectID)
-    @param('page', Types.PositiveInt, true)
     @param('ext', Types.Range(['csv', 'html']), true)
     @param('ignoreLock', Types.Boolean, true)
-    async get(domainId: string, tid: ObjectID, page = 1, ext = '', ignoreLock = false) {
+    async get(domainId: string, tid: ObjectID, ext = '', ignoreLock = false) {
         if (ignoreLock && !this.user.own(this.tdoc)) {
             this.checkPerm(this.tdoc.rule === 'homework'
                 ? PERM.PERM_VIEW_HOMEWORK_HIDDEN_SCOREBOARD
@@ -210,14 +209,14 @@ export class ContestScoreboardHandler extends ContestDetailBaseHandler {
             // Problem statistics display is allowed as we can view submission info in scoreboard.
             ...problem.PROJECTION_CONTEST_LIST, 'nSubmit', 'nAccept',
         ]);
-        const [, rows, udict, , nPages] = await contest.getScoreboard.call(this, domainId, tid, false, page, ignoreLock);
+        const [, rows, udict] = await contest.getScoreboard.call(this, domainId, tid, false, ignoreLock);
         this.response.template = 'contest_scoreboard.html';
         // eslint-disable-next-line @typescript-eslint/naming-convention
         const page_name = this.tdoc.rule === 'homework'
             ? 'homework_scoreboard'
             : 'contest_scoreboard';
         this.response.body = {
-            tdoc: this.tdoc, rows, udict, nPages, page, pdict, page_name,
+            tdoc: this.tdoc, rows, udict, pdict, page_name,
         };
     }
 
@@ -227,7 +226,7 @@ export class ContestScoreboardHandler extends ContestDetailBaseHandler {
             csv: async (rows) => `\uFEFF${rows.map((c) => (c.map((i) => i.value?.toString().replace(/\n/g, ' ')).join(','))).join('\n')}`,
             html: (rows, tdoc) => this.renderHTML('contest_scoreboard_download_html.html', { rows, tdoc }),
         };
-        const [, rows] = await contest.getScoreboard.call(this, domainId, tid, true, 0, ignoreLock);
+        const [, rows] = await contest.getScoreboard.call(this, domainId, tid, true, ignoreLock);
         this.binary(await getContent[ext](rows, this.tdoc), `${this.tdoc.title}.${ext}`);
     }
 }
diff --git a/packages/hydrooj/src/interface.ts b/packages/hydrooj/src/interface.ts
index 7ed11efd1..0c40dc2e0 100644
--- a/packages/hydrooj/src/interface.ts
+++ b/packages/hydrooj/src/interface.ts
@@ -514,9 +514,9 @@ export interface ContestRule<T = any> {
     ) => Promise<ScoreboardRow>;
     scoreboard: (
         this: ContestRule<T>, isExport: boolean, _: (s: string) => string,
-        tdoc: Tdoc<30>, pdict: ProblemDict, cursor: Cursor<ContestStat & T>, page: number,
-    ) => Promise<[board: ScoreboardRow[], udict: Udict, nPages: number]>;
-    ranked: (tdoc: Tdoc<30>, cursor: Cursor<ContestStat & T>) => Promise<[Array<[number, ContestStat & T]>, number]>;
+        tdoc: Tdoc<30>, pdict: ProblemDict, cursor: Cursor<ContestStat & T>,
+    ) => Promise<[board: ScoreboardRow[], udict: Udict]>;
+    ranked: (tdoc: Tdoc<30>, cursor: Cursor<ContestStat & T>) => Promise<[number, ContestStat & T][]>;
 }
 
 export type ContestRules = Dictionary<ContestRule>;
diff --git a/packages/hydrooj/src/lib/rank.ts b/packages/hydrooj/src/lib/rank.ts
index c0ebbb41f..6e42f11a7 100644
--- a/packages/hydrooj/src/lib/rank.ts
+++ b/packages/hydrooj/src/lib/rank.ts
@@ -1,21 +1,20 @@
 import { Cursor } from 'mongodb';
-import paginate from './paginate';
 
-type ranked = <T>(cursor: Cursor<T>, equ: ((a: T, b: T) => boolean), page?: number) => Promise<[[number, T][], number]>;
+type ranked = <T>(cursor: Cursor<T>, equ: ((a: T, b: T) => boolean)) => Promise<[number, T][]>;
 
-const ranked: ranked = async (cursor, equ, page) => {
+const ranked: ranked = async (cursor, equ) => {
     let last = null;
-    let r = page ? (page - 1) * 100 : 0;
-    let count = page ? r : 0;
+    let r = 0;
+    let count = 0;
     const results = [];
-    const [docs, nPages] = page ? await paginate(cursor, page, 100) : [await cursor.toArray(), 1];
+    const docs = await cursor.toArray();
     for (const doc of docs) {
         count++;
         if (!last || !equ(last, doc)) r = count;
         last = doc;
         results.push([r, doc]);
     }
-    return [results, nPages];
+    return results;
 };
 
 global.Hydro.lib.rank = ranked;
diff --git a/packages/hydrooj/src/model/contest.ts b/packages/hydrooj/src/model/contest.ts
index d50b2267a..f23116410 100644
--- a/packages/hydrooj/src/model/contest.ts
+++ b/packages/hydrooj/src/model/contest.ts
@@ -154,8 +154,8 @@ const acm = buildContestRule({
         }
         return row;
     },
-    async scoreboard(isExport, _, tdoc, pdict, cursor, page) {
-        const [rankedTsdocs, nPages] = await ranked(cursor, (a, b) => a.score === b.score && a.time === b.time, page);
+    async scoreboard(isExport, _, tdoc, pdict, cursor) {
+        const rankedTsdocs = await ranked(cursor, (a, b) => a.score === b.score && a.time === b.time);
         const uids = rankedTsdocs.map(([, tsdoc]) => tsdoc.uid);
         const udict = await user.getList(tdoc.domainId, uids);
         // Find first accept
@@ -186,7 +186,7 @@ const acm = buildContestRule({
                 ),
             )),
         ];
-        return [rows, udict, nPages];
+        return [rows, udict];
     },
     async ranked(tdoc, cursor) {
         return await ranked(cursor, (a, b) => a.accept === b.accept && a.time === b.time);
@@ -272,8 +272,8 @@ const oi = buildContestRule({
         }
         return row;
     },
-    async scoreboard(isExport, _, tdoc, pdict, cursor, page) {
-        const [rankedTsdocs, nPages] = await ranked(cursor, (a, b) => a.score === b.score, page);
+    async scoreboard(isExport, _, tdoc, pdict, cursor) {
+        const rankedTsdocs = await ranked(cursor, (a, b) => a.score === b.score);
         const uids = rankedTsdocs.map(([, tsdoc]) => tsdoc.uid);
         const udict = await user.getList(tdoc.domainId, uids);
         const psdict = {};
@@ -307,7 +307,7 @@ const oi = buildContestRule({
                 ),
             )),
         ];
-        return [rows, udict, nPages];
+        return [rows, udict];
     },
     async ranked(tdoc, cursor) {
         return await ranked(cursor, (a, b) => a.score === b.score);
@@ -453,8 +453,8 @@ const homework = buildContestRule({
         }
         return row;
     },
-    async scoreboard(isExport, _, tdoc, pdict, cursor, page) {
-        const [rankedTsdocs, nPages] = await ranked(cursor, (a, b) => a.score === b.score, page);
+    async scoreboard(isExport, _, tdoc, pdict, cursor) {
+        const rankedTsdocs = await ranked(cursor, (a, b) => a.score === b.score);
         const uids = rankedTsdocs.map(([, tsdoc]) => tsdoc.uid);
         const udict = await user.getList(tdoc.domainId, uids);
         const columns = await this.scoreboardHeader(isExport, _, tdoc, pdict);
@@ -464,7 +464,7 @@ const homework = buildContestRule({
                 ([rank, tsdoc]) => this.scoreboardRow(isExport, _, tdoc, pdict, udict[tsdoc.uid], rank, tsdoc),
             )),
         ];
-        return [rows, udict, nPages];
+        return [rows, udict];
     },
     async ranked(tdoc, cursor) {
         return await ranked(cursor, (a, b) => a.score === b.score);
@@ -679,18 +679,18 @@ export function canShowScoreboard(tdoc: Tdoc<30>, allowPermOverride = true) {
 
 export async function getScoreboard(
     this: Handler, domainId: string, tid: ObjectID,
-    isExport = false, page: number, ignoreLock = false,
-): Promise<[Tdoc<30 | 60>, ScoreboardRow[], Udict, ProblemDict, number]> {
+    isExport = false, ignoreLock = false,
+): Promise<[Tdoc<30 | 60>, ScoreboardRow[], Udict, ProblemDict]> {
     const tdoc = await get(domainId, tid);
     if (!canShowScoreboard.call(this, tdoc)) throw new ContestScoreboardHiddenError(tid);
     if (ignoreLock) delete tdoc.lockAt;
     const tsdocsCursor = getMultiStatus(domainId, { docId: tid }).sort(RULES[tdoc.rule].statusSort);
     const pdict = await problem.getList(domainId, tdoc.pids, true);
-    const [rows, udict, nPages] = await RULES[tdoc.rule].scoreboard(
+    const [rows, udict] = await RULES[tdoc.rule].scoreboard(
         isExport, this.translate.bind(this),
-        tdoc, pdict, tsdocsCursor, page,
+        tdoc, pdict, tsdocsCursor,
     );
-    return [tdoc, rows, udict, pdict, nPages];
+    return [tdoc, rows, udict, pdict];
 }
 
 export const statusText = (tdoc: Tdoc, tsdoc?: any) => (
diff --git a/packages/hydrooj/src/model/user.ts b/packages/hydrooj/src/model/user.ts
index 2a76b728d..b650c5710 100644
--- a/packages/hydrooj/src/model/user.ts
+++ b/packages/hydrooj/src/model/user.ts
@@ -1,4 +1,4 @@
-import { escapeRegExp, pick } from 'lodash';
+import { escapeRegExp, pick, uniq } from 'lodash';
 import LRU from 'lru-cache';
 import { Collection, ObjectID } from 'mongodb';
 import { LoginError, UserAlreadyExistError, UserNotFoundError } from '../error';
@@ -21,7 +21,7 @@ export const coll: Collection<Udoc> = db.collection('user');
 // Virtual user, only for display in contest.
 export const collV: Collection<VUdoc> = db.collection('vuser');
 export const collGroup: Collection<GDoc> = db.collection('user.group');
-const cache = new LRU<string, User>({ max: 500, ttl: 300 * 1000 });
+const cache = new LRU<string, User>({ max: 10000, ttl: 300 * 1000 });
 
 export function deleteUserCache(udoc: User | Udoc | string | undefined | null, receiver = false) {
     if (!udoc) return;
@@ -192,10 +192,10 @@ class UserModel {
     }
 
     static async getList(domainId: string, uids: number[]): Promise<Udict> {
-        const _uids = new Set(uids);
         const r: Udict = {};
-        // eslint-disable-next-line no-await-in-loop
-        for (const uid of _uids) r[uid] = (await UserModel.getById(domainId, uid)) || new User(UserModel.defaultUser, {});
+        await Promise.all(uniq(uids).map(async (uid) => {
+            r[uid] = (await UserModel.getById(domainId, uid)) || new User(UserModel.defaultUser, {});
+        }));
         return r;
     }
 
diff --git a/packages/ui-default/templates/contest_scoreboard.html b/packages/ui-default/templates/contest_scoreboard.html
index 253b29b0a..c24ba3416 100644
--- a/packages/ui-default/templates/contest_scoreboard.html
+++ b/packages/ui-default/templates/contest_scoreboard.html
@@ -74,7 +74,6 @@
         {% endif %}{%- endfor -%}
         </tbody>
       </table>
-      {{ paginator.render(page, nPages) }}
     </div>
   </div>
 </div></div>