Category: Nestjs performance

March 21, Alexandre Blondin 6 min read. This article explains how we chose our NodeJS framework at Theodo.

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At Theodo, we have been working for a long time with API Platform and Django and they provided us with everything we needed. We also turned to NodeJS on occasion, when it made sense for our projects.

Since there was no framework as complete as the one we were using for PHP or Python, we stuck to Express and, occasionally, Loopback.

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We didn't have the time nor the will to benchmark every single NodeJS framework out there, so we first decided to select front-runners. For this, we picked the following:. One common pitfall is to consider right away the pros and cons of each solution. This leads to highly opinionated discussionsthat can drift from the initial goal. We don't know if it is a good thing in regards to our target, and we cannot evaluate how other NodeJS frameworks compare.

Is the developer guided in all of his architectural choices? The learning curve should be pretty smooth, and it should be near-to-impossible for a developer to do something the wrong way.

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Is there an available ORM? Are there migrations? Since we have started using TypeScript, the developer experience has improved a lot: prevent bug, auto-imports, jump to definitions, etc. A natively typed framework is a plus. VScode, for example, has amazing built-in debugging support. Are there a lot of "magical methods", indirection?

Are such behaviours easily overridable if needed? It might be great when prototyping a website, but when you want to have a robust production, not understanding what happens under the hood is a major drawback. Some projects start from scratch, others have a legacy. Sometimes we migrate part of an application. Is it widely adopted by the community? What is the trend like?

How many 3rd party modules are there? These criteria are of course very opinionated. You'll notice for example that I didn't mention performance at all. This is because the number of rps requests per second a framework can handle has never been a blocking factor on any of our projects so far. Using Varnish cache or a CDN among other solutions has always proven itself to be enough.

MeteorJS was KO'd, because of the drawbacks that are inherent to its good qualities.Get the latest tutorials on SysAdmin and open source topics. Write for DigitalOcean You get paid, we donate to tech non-profits. DigitalOcean Meetups Find and meet other developers in your city. Become an author. It has a modular architecture that provides a mature, structural design pattern to the Node.

It has a simple, yet very powerful API along with great performance. The ease of integrating it with other libraries or existing projects makes it a perfect choice for most modern web applications. Both applications will run on different ports and will function as separate domains. This tutorial focuses on building your application in a development environment. For a production environment, you should also consider user authentication for your application. Note: This tutorial uses a macOS machine for development.

In this section, you will get started with Nest. You can easily install Nest. To begin, run the following command from the terminal to have it installed globally on your machine:. To begin the project for this tutorial, use the nest command to craft a new Nest. Immediately after running the command, nest will prompt you to provide some basic information like the descriptionversionand author.

Go ahead and provide the appropriate details. This will generate a new Nest. Afterward, you proceeded to run the application and accessed it on the default port on your local machine. MongoDB stores its data in documents as field : value pairs. To start MongoDB, open a separate terminal window so that the application can keep running, and then execute the following command:. Open the project blog-backend in your text editor and navigate to.

You can set up a connection to the database by including the installed MongooseModule within the root ApplicationModule. To achieve this, update the content in app. In this file, you use the forRoot method to supply the connection to the database. Save and close the file when you are finished editing. With this in place, you have set up the database connection by using the Mongoose module for MongoDB.We work alongside you to meet your deadlines while avoiding costly tech debt. Challenging issue?

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Contact Us. Who is using Nest?In the end, you will also learn how to secure the application with Auth0. Rather than building a React application with JavaScript, we will deviate a bit and use TypeScript instead. Structuring the application this way comes with a lot of benefits such as type checking, enforcing, and associating every variable within the application with a datatype, cool, right?

In this first part of the series, we will focus on building the backend API with Nest. The second part is about building the user interface and handling all frontend logic using React. You can find the second part here. The complete source code developed throughout this series can be found in this GitHub repository if you will prefer to head straight into the code.

Basic knowledge and previous experience with building web applications with React will help you to get the best out of this series. Although not mandatory, you should know a few things about TypeScript. And to make it easy for everyone to follow along, I will endeavor to break down any complex implementation.

Furthermore, you will also need to ensure that you have Node. If you are yet to get them installed, kindly follow the instructions here to learn how to install Node. Also, you need to have MongoDB installed on your machine. Follow the instructions here to download and install it for your choice of the operating system.

This tutorial uses a macOS machine for development. It is fully built with TypeScript, yet it still preserves compatibility with JavaScript and takes advantage of the latest JavaScript features.

nestjs performance

It brings design patterns and mature solutions to the Node. If you are conversant with the structure of Angular applications, you are going to feel more comfortable working with Nest. If you are new to Nest.

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React is an open-source JavaScript frontend framework for building an intuitive and interactive user interface. It is widely adopted and a top choice among developers because of its great performance and simplicity in the rapid development of Single-Page Applications.

It takes away the idea of thinking and visualizing a database table in rows and columns. It supports arrays and nested objects values and allows for flexible and dynamic schemas.

It is often used with Mongoose, an Object Data Modeling ODM library, that helps to manage relationships between data and provides schema validations.When we are building applications, there are many instances where we want data updates from the server to display immediately.

Once that initial load and request has been made, what happens when somebody else updates the data on the server e. Nobody would know that a new chat message has been added except the person who added it, so we need some way to check the data on the server after the initial request for data. Every 10 seconds the application would make a request to the server for the latest chat data, and load any new messages. This approach has two glaring flaws which are:.

When using Web Sockets, an event could be triggered as soon as a new chat message is added by anybody, and any clients listening will instantly be notified. This means that the chat message that was added would show up near instantaneously for the other users. NestJS has support for web sockets built-inwhich makes use of the popular socket.

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We will use our NestJS server to:. The server will just be used to relay information, it will be the responsibility of the clients to display the information. When we are done, the application should look something like this:. You could use any front-end you like, but we will be covering specifically how to use the ngx-socket-io package which makes it easier to use socket. If you are not using Angular, then you would need to implement socket. First, we are going to create our NestJS server.

In order to use web sockets in your NestJS project, you will need to install the following package:. With that package installed, we are going to create a new module called ChatModule which will handle our web socket communication. Once the module has been generated, we are going to create a new file to implement a WebSocketGateway.

nestjs performance

First, we decorate our class with WebSocketGateway which is what will allow us to make use of the socket. These will be triggered every time a client connects or disconnects. We set up a member variable called server that is decorated with WebSocketServer which will give us access to the server instance. We can then use this to trigger events and send data to connected clients.

We make use of this in our handleConnection and handleDisconnect hooks where we are incrementing or decrementing the total number of users, and then notifying any connected clients of the new number of users. The SubscribeMessage decorator is used to listening to incoming messages.

If we want to send a chat event from our client to the server, then we need to decorate the function that will handle that event with SubscribeMessage 'chat'. This function onChat in this case has two parameters: the first which we are calling client will be a reference to the socket instance, and the second which we are calling message will be the data sent by the client.

Since we want all connected clients to know about this chat message when it is received, we trigger a broadcast to those clients with client. Then, any clients listening for the chat event would receive this data instantly. We are almost done with the server, but before our gateway will start listening we need to add it to the providers in our chat module. With the server complete, now we just need to set up some kind of front-end client to interact with it.

You could even have multiple different front ends interacting with the same server. This package just implements socket.

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As well as installing it, we will also need to configure the package in our root module. Make sure to configure the SocketIoModule as shown in the app. In a production environment, you would change this to the location of wherever your NestJS server is running. Now, we are going to focus on implementing a chat service to handle most of the logic, and afterward, we will create a simple interface to send and receive chats. We inject Socket from the ngx-socket-io package to get a reference to the socket instance, and then we utilise that our three methods.

The sendChat function will allow us to send a message to the server. We call the emit method with a value of chat which means that it is going to trigger the function on the server decorated with SubscribeMessage 'chat'.Nest NestJS is a framework for building efficient, scalable Node.

Nest provides a level of abstraction above these common Node. This allows developers the freedom to use the myriad of third-party modules which are available for the underlying platform. In recent years, thanks to Node. This has given rise to awesome projects like AngularReact and Vuewhich improve developer productivity and enable the creation of fast, testable, and extensible frontend applications. However, while plenty of superb libraries, helpers, and tools exist for Node and server-side JavaScriptnone of them effectively solve the main problem of - Architecture.

Nest provides an out-of-the-box application architecture which allows developers and teams to create highly testable, scalable, loosely coupled, and easily maintainable applications. The architecture is heavily inspired by Angular. To get started, you can either scaffold the project with the Nest CLIor clone a starter project both will produce the same outcome.

To scaffold the project with the Nest CLI, run the following commands. This will create a new project directory, and populate the directory with the initial core Nest files and supporting modules, creating a conventional base structure for your project. Creating a new project with the Nest CLI is recommended for first-time users. We'll continue with this approach in First Steps. To install the JavaScript flavor of the starter project, use javascript-starter. You can also manually create a new project from scratch by installing the core and supporting files with npm or yarn.

nestjs performance

In this case, of course, you'll be responsible for creating the project boilerplate files yourself. Nest is an MIT-licensed open source project. It can grow thanks to the support by these awesome people. If you'd like to join them, please read more here. Subscribe to stay up to date with the latest Nest updates, features, and videos!

Standalone apps. Migration guide. T-Shirts and Hoodies. Support us. Introduction Philosophy Installation. MongoDB Atlas is the most reliable cloud database service available. Try now! Support us Nest is an MIT-licensed open source project. Principal Sponsor. Join our Newsletter Subscribe to stay up to date with the latest Nest updates, features, and videos!The backend was structured around a microservices architecture built partially in Node.

These technologies power the listings on the website, as well as various internal tools, like community manager dashboards as well as RFID hardware for access management.

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Instead, we opted to split the codebase to allow for a richer front-end experience, focus on skill specificity when hiring, and give us the flexibility to be consumed by multiple clients in the future. We also considered. NET core or Node. We're using GitHub and Trello to track issues and projects, and a plethora of other tools to help the operational team, like ZapierMailChimpGoogle Drive with some basic Vue.

One of our objectives with the public launch of the Feed was to enable a Server-side rendered SSR experience for our organic search traffic. When you visit the StackShare Feed, and you aren't logged in, you are delivered the Trending feed experience.

We use an in-house Node. This microservice needs to run and serve requests independent of our Rails web app.

Up until recently, we had a mono-repo with our Rails and React code living happily together and all served from the same web process. In order to deploy our SSR app into a Heroku environment, we needed to split out our front-end application into a separate repo in GitHub.

The driving factor in this decision was mostly due to limitations imposed by Heroku specifically with how processes can't communicate with each other. A new SSR app was created in Heroku and linked directly to the frontend repo so it stays in-sync with changes.

A new CircleCI script builds the bundles and uploads them to S3. The final step in our rollout is to update some keys in Redis so our Rails app knows which bundles to serve. The result of these efforts were significant. Back inI was given an opportunity to re-architect SmartZip Analytics platform, and flagship product: SmartTargeting. I had inherited years and years of technical debt and I knew things had to change radically. For the SaaS product, we kept on working with Rails as this was what my team had the most knowledge in.

We've however broken up the monolith and decoupled the front-end application from the backend thanks to the use of Rails API so we'd get independently scalable micro-services from now on. Our various applications could now be deployed using AWS Elastic Beanstalk so we wouldn't waste any more efforts writing time-consuming Capistrano deployment scripts for instance.