Node.js Nodejs express-这是内存泄漏吗？

您好，我是Node的初学者，非常感谢您的帮助

我有一个nodejsexpressapi项目，它会导致随机的高内存使用率。 我使用

process.memoryUsage（）

关注内存消耗堆在30mb到40mb之间保持不变，但一天中有一两次节点服务器崩溃，说Javascript堆内存不足，我不得不手动重新启动它

生产内存使用情况：

["Memory: rss 93.25 MB","Memory: heapTotal 40.68 MB","Memory: heapUsed 30.12 MB","Memory: external 19.47 MB","Memory: arrayBuffers 18 MB"]

简单解释一下我的项目架构，让我知道它是否正确：

index.js

routes.js

api.js（控制器）

现在在我的控制器中，我还有各种全局函数，比如调用一些外部RESTAPI，一些数组计算，一些迭代。那么全局函数是否通过GC自动释放？我还附上了一个堆截图，所有的函数都在泄漏内存吗？

 var path = require('path');
    var logger = require('morgan');
     
    var express = require('express');
    var mongoose = require('mongoose');
    var cors = require('cors');
    var cookieParser = require('cookie-parser');
    var ObjectId = require('mongodb').ObjectID;
    const routes = require('./routes/appapiv1/routes');
    var app = express();
    mongoose.connect('mongodb://localhost:27017/Database', { useUnifiedTopology: true, useNewUrlParser: true });
    const db = mongoose.connection;
    db.on('error', console.error.bind(console, 'connection error:'));
    db.once('open', function () {
         
    });

app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
// Make our db accessible to our router
app.use(function (req, res, next) {
    req.db = db;
    next();
});
    app.use(express.static('public', options))
    app.use(logger('dev'));
    //app.use(bodyParser.json());
    //app.use(bodyParser.urlencoded({ extended: true }));
    app.use(express.json({ limit: '50mb' }));
    app.use(express.urlencoded({ limit: '50mb', extended: true }));
    app.use('/', routes);
    app.listen(port);

var express = require('express');
var Api = require('../appapiv1/api');
const router = express.Router();

router.post('/apiOne', Api.functionOne);
router.get('/apiTwo', Api.functionTwo);
router.post('/apiThree', Api.functionThree);
module.exports = router;

  var Api = {};
Api.functionOne = function (req, res) {

    res.send({ status: 1, data: data });
};

var someFunction = function () {
    //doing some work and returing
}
Api.functionTwo = function (req, res) {
    var object = someFunction();
    res.send({ status: 1, data: data });
};
var someFunctionMore = function () {
    //doing some work and returing
}
Api.functionThree = function (req, res) {
    var object = someFunction();
    res.send({ status: 1, data: data });
};

module.exports = Api;