diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index c36f0ccd7..0a2470343 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "2.15.1",
+    "version": "2.15.2",
     "bin": "bin/hydrooj.js",
     "main": "dist/loader.js",
     "typings": "dist/loader.d.ts",
diff --git a/packages/hydrooj/src/entry/worker.ts b/packages/hydrooj/src/entry/worker.ts
index f6d9dcc54..a69635835 100644
--- a/packages/hydrooj/src/entry/worker.ts
+++ b/packages/hydrooj/src/entry/worker.ts
@@ -1,5 +1,6 @@
 /* eslint-disable no-await-in-loop */
 /* eslint-disable import/no-dynamic-require */
+import { argv } from 'yargs';
 import {
     locale, template, lib, service, model, handler, script, setting, uistatic,
     builtinLib, builtinScript, builtinHandler, builtinModel,
@@ -8,24 +9,32 @@ import options from '../options';
 import * as bus from '../service/bus';
 import db from '../service/db';
 import storage from '../service/storage';
+import { Logger } from '../logger';
+
+const logger = new Logger('loader/worker');
 
 export async function load() {
     const pending = global.addons;
     const fail = [];
     const active = [];
+    if (argv.loaderDetail) logger.info('start');
     require('../lib/i18n');
     require('../utils');
     require('../error');
     require('../options');
+    if (argv.loaderDetail) logger.info('finish: options');
     await Promise.all([
         locale(pending, fail),
         template(pending, fail),
         uistatic(pending, fail),
     ]);
+    if (argv.loaderDetail) logger.info('finish: locale/template/static');
     const opts = options();
     await db.start(opts);
+    if (argv.loaderDetail) logger.info('finish: db.connect');
     const modelSystem = require('../model/system');
     await modelSystem.runConfig();
+    if (argv.loaderDetail) logger.info('finish: config');
     const [endPoint, accessKey, secretKey, bucket, region, endPointForUser, endPointForJudge] = modelSystem.getMany([
         'file.endPoint', 'file.accessKey', 'file.secretKey', 'file.bucket', 'file.region',
         'file.endPointForUser', 'file.endPointForJudge',
@@ -34,28 +43,44 @@ export async function load() {
         endPoint, accessKey, secretKey, bucket, region, endPointForUser, endPointForJudge,
     };
     await storage.start(sopts);
+    if (argv.loaderDetail) logger.info('finish: storage.connect');
     for (const i of builtinLib) require(`../lib/${i}`);
+    if (argv.loaderDetail) logger.info('finish: lib.builtin');
     await lib(pending, fail);
+    if (argv.loaderDetail) logger.info('finish: lib.extra');
     require('../service/gridfs');
     require('../service/monitor');
+    if (argv.loaderDetail) logger.info('finish: gridfs/monitor');
     const server = require('../service/server');
     await server.prepare();
+    if (argv.loaderDetail) logger.info('finish: server');
     await service(pending, fail);
+    if (argv.loaderDetail) logger.info('finish: service.extra');
     for (const i of builtinModel) require(`../model/${i}`);
+    if (argv.loaderDetail) logger.info('finish: model.builtin');
     for (const i of builtinHandler) require(`../handler/${i}`);
+    if (argv.loaderDetail) logger.info('finish: handler.builtin');
     await model(pending, fail);
+    if (argv.loaderDetail) logger.info('finish: model.extra');
     const modelSetting = require('../model/setting');
     await setting(pending, fail, modelSetting);
+    if (argv.loaderDetail) logger.info('finish: setting');
     await handler(pending, fail);
+    if (argv.loaderDetail) logger.info('finish: handler.extra');
     for (const i in global.Hydro.handler) {
         await global.Hydro.handler[i]();
     }
+    if (argv.loaderDetail) logger.info('finish: handler.apply');
     const notfound = require('../handler/notfound');
     await notfound.apply();
     for (const i of builtinScript) require(`../script/${i}`);
+    if (argv.loaderDetail) logger.info('finish: script.builtin');
     await script(pending, fail, active);
+    if (argv.loaderDetail) logger.info('finish: script.extra');
     await bus.serial('app/started');
+    if (argv.loaderDetail) logger.info('finish: bus.serial(start)');
     await server.start();
+    if (argv.loaderDetail) logger.info('finish: server.start');
     setInterval(() => {
         process.send({ event: 'stat', count: global.Hydro.stat.reqCount });
         global.Hydro.stat.reqCount = 0;