NodeJs网站TTFB很高，网站运行速度非常慢 [英] NodeJs website TTFB is very high and site is running very slow

问题描述

我已经使用Express&在nodejs中创建了一个网站.玉. 当我以很少的内容加载简单的登录页面时，即使这样加载起来也要花费很多时间. TTFB太高(请参阅随附的屏幕截图.) 以下是我的app.js代码.不知道我在做什么错.

I have created a website in nodejs with Express & Jade. When i load the simple login page with very less content, even then it taking is much time to load. It's TTFB is too high (ref to screenshot attached.) Below is my app.js code. Not sure what i'm doing wrong.

app.js

// Packages
var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var dbhelper = require('./routes/dbhelper.js')
var common = require('./routes/common.js')
var session = require('express-session')
var http = require('http');

var app = express();
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

app.use(session({
    secret: 'keyboard cat',
    resave: false,
    saveUninitialized: true,
    cookie: { secure: true }
}))

// uncomment after placing your favicon in /public
//app.use(favicon(__dirname + '/public/favicon.ico'));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(require('stylus').middleware(path.join(__dirname, 'public')));
app.use(express.static(path.join(__dirname, 'public')));
//app.locals.basedir = path.join(__dirname, 'views');

// set up mustbe config
var mustBe = require("mustbe");
var mustBeConfig = require("./mustBeConfig");
mustBe.configure(mustBeConfig);

// Routes
var routes = require('./routes/index');
var users = require('./routes/users');
var dashboard = require('./routes/dashboard');
var monitor = require('./routes/monitor');
var resetpassword = require('./routes/resetpassword');
var archive = require('./routes/archive');
var archiveList = require('./routes/archiveList');
var archiveSetup = require('./routes/archivesetup');


app.locals.moment = require('moment');

app.use(function (req, res, next) {
    res.locals.session = session;
    next();
});


// Make database connection available to router
app.use(function (req, res, next) {
    req.sessionID = req.sessionID;
    req.db = dbhelper.sql;
    req.config = dbhelper.config;
    req.ActionOutput = common.ActionOutput;
    req.ActionStatus = common.ActionStatus;
    req.ChangeEmployer = common.ChangeEmployer;
    // Redirect to login page if no session found
    if ((session.Employee == null || session.Employee == undefined || session.Employee == '') && (req.url != '/' && req.url != '' && req.url != '/login'))
        res.redirect('/');
    // Redirect to dashboard if session exists & redirecting to login page
    else if ((session.Employee != null && session.Employee != undefined && session.Employee != '') && (req.url == '/' || req.url == '' || req.url == '/login'))
        res.redirect('/dashboard');
    else
        next();
});



app.use('/', routes);
app.use('/users', users);
app.use('/dashboard', dashboard);
app.use('/monitor', monitor);
app.use('/resetpassword', resetpassword);
app.use('/archive', archive);
app.use('/archiveList', archiveList)
app.use('/archivesetup', archiveSetup);


process.on('uncaughtException', function (err) {
    console.log('Caught exception: ${ err}');
    var EID = SaveErrorLog(err.message, err.stack, 'a', err.address);
});


app.use(function (err, req, res, next) {
    if (!err)
        return next();
    var EID = SaveErrorLog(err.message, err.stack, req.connection.remoteAddress , err.path);
    // Check if request is ajax
    var is_ajax_request = req.xhr;

    var op = new common.ActionOutput();

    op.ActionStatus = common.ActionStatus.Error;
    op.Message = err.message;
    res.send(op);
});

function SaveErrorLog(Message, CompleteError, IP, URL) {
    // Get Logged In User
    var UserID = null;
    if (session.SupportUser != null && session.SupportUser != undefined && session.SupportUser != '') {
        UserID = session.SupportUser.UserID;
    } else if (session.Employee != null && session.Employee != undefined && session.Employee != '') {
        UserID = session.Employee.EmployeeID;
    }
    // Log Error Into Database 
    var ErrorLogID = 0;
    var sql = dbhelper.sql;
    var conn = new sql.Connection(dbhelper.config);
    conn.connect().then(function () {
        // Stored Procedure 
        var request = new sql.Request(conn);
        request.input('UserID', sql.BigInt, UserID);
        request.input('Message', sql.VarChar(500), Message);
        request.input('CompleteError', sql.VarChar(2000), CompleteError);
        request.input('IP', sql.VarChar(50), IP);
        request.input('URL', sql.VarChar(50), URL);
        request.execute('USP_SaveErrorLog', function (err, recordset, returnValue) {
            if (!err && recordset[0][0].ValidationCode == null) {
                ErrorLogID = recordset[0][0].ErrorLogID;
            } else {

            }
            return ErrorLogID;
        });
    });
}

// catch 404 and forward to error handler
app.use(function (req, res, next) {
    var err = new Error('Not Found');
    err.status = 404;
    next(err);
});

// error handlers

// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
    app.use(function (err, req, res, next) {
        res.status(err.status || 500);
        res.render('shared/error', {
            message: err.message,
            error: err
        });
    });
}

// production error handler
// no stacktraces leaked to user
app.use(function (err, req, res, next) {
    res.status(err.status || 500);
    res.render('shared/error', {
        message: err.message,
        error: {}
    });
});


module.exports = app;

//app.listen(1234, function () {
//    console.log('Server starts on port: ' + 1234);
//});

http.createServer(app).listen(1234, function () {
    console.log('Express server listening on port ' + 1234);
});

我还从app.js中删除了所有与数据库相关的工作，但仍然面临着同样的问题. 任何帮助都将是可观的.

I have also removed all database related work from app.js but still facing same issue. Any help would be appreciable.

推荐答案

我们使用了类似的方法，它将缓存玉石内容并减少TTFB

We have used something like this, it will cache jade content and reduce TTFB

/* GET home page. */
router.get('/', function (req, res) {
    var abs = session.Employers;
    var options = {cache: true , title: 'Express'};

    //Method 1
    //var template = jade.compileFile('./views/login/index.jade', options);
    //res.send(template({ title: 'Express' }));

    //Method 2
    res.send(jade.renderFile('./views/login/index.jade', options));

});

这篇关于NodeJs网站TTFB很高，网站运行速度非常慢的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！