State of AI Development: 34x growth in AI projects, OpenAI's dominance, the rise of open-source, and more

Fri Jul 14 2023 by Jeff Burke

With the introduction of Large Language Models (LLMs), for the first time, Machine Learning (ML) and Artificial Intelligence (AI) became accessible to everyday developers. Apps that feel magical, even software that was practically impossible to build by big technology companies with billions in R&D spend, suddenly became not only possibly, but a joy to build and share.

Replit AI Manifesto

Tue Jun 6 2023 by Michele Catasta

Amjad Masad, CEO: I'm excited to welcome Michele Catasta to the Replit team as our VP of AI. Michele joins us from Google, where he was Head of Applied Research at Google Labs and, before that, Google X, where he researched Large Language Models applied to code. Michele has a Ph.D. in Computer Science and was Research Scientist and Instructor in AI at Stanford University. This manifesto is a culmination of a conversation Michele and I have had for over a year on the future of AI and its impact on the software industry:

Deploy a Cloudflare Worker from Replit – anytime, anywhere

Wed Mar 1 2023 by The Replit Team

Replit x Cloudflare

From large-scale businesses to nonprofits to anyone on the Internet, Cloudflare aims to make developer applications faster, more secure and more reliable. Cloudflare also offers an entire suite of developer products to help build the fundamental pieces of their applications. Every day, thousands of new developers around the world use the Cloudflare Developer Platform offerings from compute to storage to opinionated developer products to deploy everything from serverless functions to full-stack applications.

Zero-Click Auth For Your Apps

Tue Aug 2 2022 by Matt Iselin

Picture this: you've built an arcade game on Replit. Gamers playing your game will head to the repl's cover page and click "Run". They love your game, and they send you feature requests and ideas in the comments. Now, you want to keep track of high scores and add other social features to your game. This used to be a show-stopper: there was no way to verify the API requests coming in, so your high-score feature was either easy to spoof, or simply didn't get off the ground.

Worldwide Repls, part 1: The Control Plane

Fri Jul 8 2022 by Luis Héctor Chávez

During the ReplCon 2022 keynote, we announced that we were going to geo-distribute our infrastructure so that your Repls are much faster when accessed outside of the United States. The speed of electrons / light in a medium is a fundamental speed limit. Most of our users are several thousand kilometers away from the data centers where we host Repls (currently limited to the United States), so the round trip from them to the users' homes is going to necessarily take several hundred milliseconds just to traverse the series of tubes that is the Internet. Today, we have finished the first milestone to make this a reality, and that comes with some pretty neat side-effects!

“Generate code”: state what you want, get code back

Wed Jun 1 2022 by Jonathan Unikowski

Today, we're launching “Generate code” to all subscribers of our Hacker Plan. With “Generate code”, you state what you'd like your code to do, and an artifical intelligence writes it for you. You can then run the code right from your repl, with all the other Replit features you know and love (packages get magically installed, a web server gets started if you need it, you can invite your friends for a multiplayer session, and much more).

Tips for safer social repl development

Wed May 18 2022 by J Malcolm

Replit makes coding into a social activity, in many different ways. You can easily share your repl with our vibrant developer community to receive feedback, tips, and kudos. Our multiplayer features allow you to write, review and debug your code together with buddies. And with access to the full power of the Internet and dozens of powerful programming languages, you can even write code that brings other users into your repl in real time.

Kaboom Draw

Mon Feb 28 2022 by tga

Programming is hard, especially for beginners where the code <-> output feedback loop is cumbersome. People need to click run button, see output, change code, click run again see output. There are a lot of ideas that greatly improved this experience like live-reloading (a lot in the audio / visual context, and UI dev). However the most exciting idea I've seen is still the experiments done by Bret Victor, like in Learnable Programming. Seeing his experiements on combining live reload + sensible controls still takes my breath every time.

Making new Python repls 100x faster to start up

Fri Feb 4 2022 by Luis Héctor Chávez

Python is currently the world's (and Replit's) most popular programming language. We've improved the Python experience during last year, with a Python package cache to make installs faster, and an integrated, multiplayer debugger to increase the understanding of what programs do. But there are still a few problems with Python. Packages are often very space-consuming, so they are installed into an ephemeral 2 GiB scratch disk to avoid filling up repl directories. Unfortunately this means that every time a Python repl starts, a lengthy package installation process must happen. This makes some Python repls take forever to start! Some other packages that have a large number of dependencies (like TensorFlow and Torch) were completely unusable because they don't even fit on the scratch directory.

Python for Beginners: Interpreting My Amazon Spending with a Repl, Part Three

Sat Jan 1 2022 by Brittany Pirkle

I know you have been on the edge of your seats wondering why in the world a repl is better than a spreadsheet to calculate so much data?! In case you need a refresher, I analyzed my Amazon spending for 2021 using a Python repl and with just a few lines of code I could discern a variety of answers about my spending. Not only did I find out that I am spending way too much money on Amazon, but I also came to the conclusion of why a repl is better than a spreadsheet (read to the bottom to find out).

Ace, CodeMirror, and Monaco: A Comparison of the Code Editors You Use in the Browser

Tue Dec 14 2021 by Faris Masad

I’ve been working on Replit for roughly six years now, and as the team has grown, I’ve focused on the IDE (what we call the workspace) portion of the product. Naturally, I was increasingly preoccupied with the code editor. While we’ve considered creating a code editor that meets our needs, the complexity involved in developing one, the richness of open-source choices available, and the size of our staff made it a fruitless rabbit hole to enter. Our time is best spent elsewhere. I have had the pleasure (and the pain) of using Ace, Monaco, and CodeMirror in production settings, sometimes simultaneously (more on that later). In this post, I’ll go over some Replit history, my experience using the editors, and how they stack up against one another.

Will Nix Overtake Docker?

Mon Nov 29 2021 by Connor Brewster

In many discussions about Nix, the comparison of Nix and Docker comes up frequently. This question could be dismissed by saying that Nix and Docker are different tools that solve different problems. One is a toolkit for building and deploying containers and the other is a package and configuration manager. However, these tools do have some overlap: they can both be used to create reproducible environments. A reproducible environment is one that can be recreated from scratch in an identical way (ideally bit-for-bit). Practically, this means having the same tools, versions, and configuration between the environments.

Announcing File Persistence in Hosted Apps for Hackers

Thu Nov 11 2021 by Luis Héctor Chávez

We mostly think of repls as being full computers in the cloud, and one of the goals of the platform team at Replit is to enable people to build almost anything in replspace. In the past, when a file was stored in a repl, it would only be saved when the editor was opened. This went against our goal and made it impossible to write certain servers that changed files at runtime. This was especially hard for newcomers, because that's the easiest way to persist information. Starting today, Hacker and Teams subscribers will be able to write services that accept file uploads or store data in a local database (think SQLite) or text file, regardless of how the repl was started.

Python for Beginners: Interpreting My Amazon Spending with a Repl

Wed Nov 3 2021 by Brittany Pirkle

About a year ago, I created a blog series on a novice learner’s journey into the world of code through a look at the basics (read the whole series here). Now, with a much larger knowledge base and understanding of both code and Replit, I am taking it a step further into a new language and project. My goal is to create a practical beginner project and justify why using Replit is the best option, even for beginners.

How I Created an NPM Package to Access Amtrak's Semi-Private API

Wed Sep 15 2021 by Piero Maddaleni

Recently, I took it upon myself to both learn TypeScript and reverse engineer Amtrak's train tracking API. The result of this was the Amtrak NPM Package and my own Amtrak Train Tracking API. I wanted to make it easier for others to use the API, as the data received from Amtrak's endpoint isn't useable without the use of decryption, and even then the resulting data is all in one massive JSON object.

Data Loss: a sad tale with a happy ending

Fri Sep 10 2021 by Luis Héctor Chávez

Earlier this year, we discovered that we were losing data for some of our users. This manifested as either repls being completely empty after reloading, or some of the changes to files not being present after reloading. Obviously losing data is the worst we can do, so we had to fix this immediately. This blog post narrates the adventure of how we discovered this, how we fixed it, and the lessons we learned during the way.

Everyone will learn to program (or why the computer revolution *still* hasn't happened yet)

Thu Aug 19 2021 by Patrick Coleman

Last week I spoke on behalf of Replit at the ASU+GSV summit, one of the largest education technology conferences in the world, on the topic "Is coding an essential modern fluency?". For me and the rest of the panelists (Mike Smith of Harvard, Taniya Mishra of SureStart, and Krishna Vedati of Tynker) the answer is an easy and obvious YES. And I'm guessing if you've been coding along with Replit's journey, it's a yes too.

Replit²

Fri Aug 6 2021 by Guillaume St-Pierre

Replit has many use cases and features, but one that's less talked about is its ability to serve as a secure compute environment for specialized apps. What if you want to build some tool that will generate code, then execute it for your users? Or maybe you are building a specialized online IDE that injects code for users, then executes the bundle? With Replit, you can start building those kinds of applications quickly without having to focus on building a fast and secure backend. Build the frontend, we'll provide the compute power.

The wild west of the internet

Thu Jul 29 2021 by Nathan Zilora

Emails are the wild west of the internet. A lawless land filled with incompatibility and unexpected behaviors. At the same time, it’s still one of the best ways we can reach our customers and inform them about new features and events that they might be interested in. I’m going to talk about a recent experience I had with the emails, specifically Gmail iOS dark mode. My hope is that you can learn from this experience and it’ll save you the time and turmoil it cost me.

A Python Framework With Built-in Database and Auth Support

Wed Jul 28 2021 by Spencer Pogorzelski

Replit enables coders to build apps quickly. With nothing but a browser, a developer can spin up a server, store data in Repl DB, and authenticate users using Repl Auth. However, until today, users had to string together all these components to build an app. This is why we're excited to announce replit.web, a Python framework focused on making apps quickly. Building an app with user auth and persistence has never been easier:

Building a web app with Nix (Because why not?)

Fri Jul 16 2021 by Guillaume St-Pierre

Learning a new programming language can be a very difficult task. Where should you start? How do I improve my skills from "Hello, World!" to building complete applications? It helps to have a starter project. One of my favourites is building a web app. I have been learning the Nix package manager for a few weeks now - starting with creating a dynamic version system - and I think its the perfect time to write a web application with it (Even though I probably shouldn't).

Multiplayer Debugging Experience for Python, Node.js, Java, and C/C++

Fri Jul 2 2021 by Luis Héctor Chávez, Alex Kotliarskyi, Tyler Angert

A couple of months ago, we announced our intention to create a new collaborative program comprehension experience for your repls. This project isn't just about figuring out what's wrong with your code, but really understanding what's going on, together with the people you work with. Today, we are happy to announce that we're releasing the first phase of this experience: a Replit-native, zero-configuration, multiplayer-friendly, interactive debugger for C, C++, Node.js, Python, and Java repls!

How I learned to code by creating a simple Slack bot

Fri Jun 25 2021 by Tala Awwad

Hi, my name is Tala👋 , and I have always been so inspired by engineers and their ability to create something out of basically nothing. So one goal of mine was to be able to create something just like they do every day. Mind you, in no way am I experienced in programming; I actually find it quite intimidating (my background is business). However, I wanted to challenge myself and start off small by creating a Slack bot that can automatically send our “Weekly Wins” thread. Weekly Wins

How we went from supporting 50 languages to all of them

Mon May 24 2021 by Connor Brewster and Mason Clayton

At Replit, we want to give our users the most powerful, flexible, and easy-to-get-started coding environment. However, it has been limiting because we only support a fixed set of languages and OS packages, some of which are outdated. Ideally, users should be able to use any language and install any package with minimal fuss. That's why today, we're announcing that we've incorporated Nix in our infrastructure to give users access to over 30,000 OS packages instantly.

A URL Shortener in 16 Lines of Code with Node.js and nanoexpress

Tue May 11 2021 by Piero Maddaleni

The Backstory

The Slack message I received last October In October of 2020, Meghan, our people person, messaged me asking if there was a professional-looking URL shortener. Over the next 48 hours, I created Replit.sh, a URL shortener for use by the Replit team and published it on Github for anyone to use. For the past few days, I have been working on rewriting the entire system from the ground up and so it just made sense for me to make a tutorial on how it is done.

Why We Switched From Webpack To Vite

Wed Apr 28 2021 by Sergei Chestakov

At Replit, our mission is to make programming more accessible. We provide people with free compute in the cloud so that they can build apps on any device. Among the most popular ways to create apps on the web today is React. Historically, however, React tooling has been slow on Replit. While the JavaScript ecosystem has produced excellent tools for professional developers, many of the most popular ones, like Create React App and Webpack, have become increasingly complex and inefficient.

Debug, Debugger, Debuggest!—A new Collaborative Comprehension Experience

Fri Apr 23 2021 by Luis Héctor Chávez

Earlier this year, we decided to close the #1 most requested entry in our Canny board, which requested to improve our previous debugger so that it could also work with multiple files in a project. This was done because it became very clear that there is a need to have better tools to aid with program comprehension built directly into Replit. But we also realized that we could go even further. Even though most of our users could be happy with a traditional debugger experience, our mission is to give people computer superpowers! So today we are announcing that we are working on a new, reimagined, collaborative debugging experience (or maybe we should call it a "program comprehension experience?").

A whiteboard for every repl

Fri Apr 23 2021 by Jeremy Press

Replit is a place where beginners, educators, and professionals alike can code and share their ideas collaboratively. Something that goes hand and hand with your source code is how you communicate it. We built threads, which allow you to leave contextual messages around code, and added better markdown support for READMEs and other guides. However, we were missing a visual way for people to explain and collaborate around code. Today we're excited to announce support for draw files, powered by excalidraw.

Meet the college students who used Replit to build a startup with $1,000 in monthly revenue in 3 weeks

Tue Apr 13 2021 by Søren Rood

Hi 👋🏻, I'm Søren. I'm a computer science student based in Seattle, Washington. I've always been interested in the intersection of finance and computer science and I tend to find myself building things in the space. Before I was offered a position at Replit, I worked as a software engineer at a FinTech startup writing market-making systems for various crypto brokerages. While I was doing this, I was also working on a side-project with my close friends and co-founders Justin and Steven. This project is called Blubbr.

Welcome to the Wonderful World of Clusters

Fri Mar 26 2021 by Luis Héctor Chávez

Having a solid foundation is critical for us to be able to fulfill our mission of making programming more accessible, more creative, and more fun. We did a great job of making the platform more stable during last year, but every now and then we would still run into unforeseen problems that cascaded into other parts of the platform, producing a bad experience for everyone. So back in October (just a few weeks after I joined the team) when we had 2 load-related site-wide outages within a week, we knew it was time to do a major overhaul of how our infrastructure handles traffic. And now today, we're announcing that as a side effect of that infrastructure change, Hacker repls now run in newer, more powerful machines, which means that we'll have more room to grow and experiment with more benefits for Hackers (and you might find that things feel a little bit snappier lately). This is the first of a three-part series of blogposts on how we rebuilt our infrastructure over the course of ~5 months.

Replit Case Study - Catalyst Coding Club

Thu Mar 11 2021 by Aaryan Jain

Realizing the lack of exposure to STEM skills for younger students, a group of high school students started Catalyst, a club to introduce students all ages to CS and making sure it is accessible for everyone. Located in Redmond WA, Catalyst strives to produce an environment in which students can thrive and become passionate about the technological world. It is our goal to help ensure students in our community get the exposure they need to computer science and make an informed decision about their future careers.

Replit's Intern Interview Process

Wed Mar 10 2021 by Meghan Larson

Our team is blown away by the level of talent that applied to our 2021 internship programs. I read every official application (over 500!) and looked at countless projects. Our initial intention was to be open to community members that saw the post on our jobs page, applicants that I spoke with at college career fairs, and people that our teammates referred. However, our application link was quickly shared, and we had an avalanche of talented and passionate candidates applying.

Killing Containers at Scale

Mon Feb 1 2021 by Connor Brewster

To make it so that anyone with a web browser can code on Replit, our backend infrastructures runs on preemptible VMs. That means the computer running your code can shutdown at any time! We've made it really fast for repls to reconnect when that happens. Despite our best efforts, though, people had been seeing repls stuck connecting for a long time. After some profiling and digging into the Docker source code, we found and fixed the problem. Our session connection error rate dropped from 3% to under 0.5% and our 99th percentile session boot time dropped from 2 minutes to 15 seconds.

Rails in 30 seconds

Sat Jan 30 2021 by Amjad Masad

Philosophically, Replit and Rails are incredibly aligned. We both exist to remove excessive configuration and complexity that stands in the way of building things. However, for a long time, it bothered me that Replit didn't work well with Rails because we focus on small and lightweight projects. Recently, our infrastructure has gotten much more powerful, and I decided to give Rails another spin. It turns out it's not only possible to do Rails on Replit; it's quite a delightful experience. It takes less than 30 seconds from starting a project to seeing the welcome screen:

Going Global

Thu Jan 28 2021 by Amjad Masad & Zach Anderson

We had the idea for Replit in Jordan, launched as a startup in New York, and incorporated as a company in San Mateo. The US gave us the infrastructure, the capital, and network to launch our business, and for that we're forever grateful. However, to us, the internet is a new country and we want to make our citizenship official and our commitment real. We're joining our global community of hackers, students, teachers, and entrepreneurs and becoming a global company and service. Starting today:

  • Our first two non-US compute regions are up -- Mumbai, India and London, England -- making us a global service
  • We're hiring worldwide making us a globally distributed company

Ode to Educators

Thu Jan 28 2021 by Derrick McMillen

"Why am I here? I don't even like computer science", Raul lingered by the door, his body language showing his discomfort. "This is a mistake. I'm not supposed to be here". Now fully within the classroom, Raul alternated between pacing in circles and eyeing the last few good seats left in our quickly filling classroom. Several minutes passed, and my students used the last remaining minutes of their passing period to trade stories from their summer and muse about the overwhelming sensation of the coming year. They were 11th graders now, after all; this was "the most important year to appeal to colleges."

Anyone Can Code - Week 7

Mon Dec 14 2020 by Brittany Pirkle

I have come to the end of my journey and have to say I am pleased with the outcome. My knowledge level before this experiment was literally zero. My husband even told me that code was hard and it would be difficult to produce an entire website in a short period of time. I will admit there were several times of head scratching and google searches galore. I also had several experts I could go to when CSS was confusing me. However, overall, I feel I gained knowledge on a subject that was, formerly, completely foreign to me. Ironically, an associate of mine reached out looking for someone who could assist her in solving an HTML code issue on her website. I was able to successfully help her fix the problem and explain to her some of the basics of code. I wouldn’t go so far as saying the former teacher turned student has become the teacher again, but this new skill set is already coming in handy.

Anyone Can Code - Week 6

Thu Dec 3 2020 by Brittany Pirkle

Here we are at week six and the web page is essentially done! That wasn’t so bad, was it? (Here is what I have done the last five weeks). The final step is to create a customized domain. This final step is optional because Repl.it does provide a domain name when a web page is created. However, for something more personalized, a customized domain name can be purchased. The cool part about this is when a domain name is purchased, you can call it whatever you want (as long as the name’s available), you own it, and no one else can use it.

How to Land Your First Job as a Python Developer

Thu Sep 10 2020 by Galina Divakova

Python’s status as one of the world’s most widely used programming languages is well known. Some experts rank it to be at par with JavaScript in terms of simplicity, flexibility, and popularity. Its syntax is so straightforward and easy to read, custom-built software packages written in Python are the most shared in top online repositories. From app development to Google using the language for crawling webpages — Python is everywhere and it’s an exciting time to be a Python Developer.

Audio - Play sound in any language on the web

Fri Jul 31 2020 by Wade Bourne

Audio brings games and projects to life! Web developers have it easy, they can publish their apps on the web and play audio using the browser API no problem. However, what about those of us that are command-line and graphics apps in other languages? Repl.it is a special place on the web where you can publish any app in any language, but so far it’s been missing audio capabilities because code executes in a container on the backend. This summer, for my internship I set out to solve this problem and make it possible to play audio in any repl in any language. In this post I’ll show you how to play audio in your repl and then I will chronicle the journey that got us here.

How to Conduct Remote Interviews

Fri Mar 20 2020 by Amjad Masad

Remote interviews can be hard, especially if you’ve never done them before. With the COVID-19 crisis, we’re seeing a lot of teams forced to transition to remote interviewing. Luckily, we’ve done hundreds of remote phone screens, and more recently we’ve been doing what we’re calling “remote onsites.” In this post, we'll describe how we and some of our customers leverage Repl.it Multiplayer -- our realtime collaborative development environment -- and other tools to interview candidates remotely.

CLUI: Building a Graphical Command Line

Thu Mar 5 2020 by Tyler Angert and Moudy Elkammash

“Command line interfaces. Once that was all we had. Then they disappeared, replaced by what we thought was a great advance: GUIs. GUIs were - and still are - valuable, but they fail to scale to the demands of today's systems. So now command line interfaces are back again, hiding under the name of search. Now you see them, now you don't. Now you see them again. And they will get better and better with time: mark my words, that is my prediction for the future of interfaces.” [1]

Repl from Repo

Tue Dec 10 2019 by Amjad Masad

When I think of GitHub I imagine a vast network of people and code; a superorganism that changed how we make software. When I was getting into programming, starting a new project was daunting -- you had to imagine and build everything nearly from scratch. My version of code-sharing was calling my older cousin who was going to college for CS and getting code dictated to me over the phone. When the Internet arrived in my home town, it made hacking on new projects so much more fun. Starting a new project, at least initially, became about discovery:

Databases Built by Students

Mon Sep 24 2018 by Nathan Zilora

In case you weren't aware, the repl.it discord server recently had a code jam, with the objective being to make a database. Over 14 people finished and submitted a design for the jam. However this jam was a bit different compared to our first and second jams. First of all, we have groups of 2, instead of individual people. This could be viewed and a boon or a bane, but we'll go over that in more detail later. The second set differences were the bonus points. In the past, we've always graded on code quality, efficiency, and creativity.

Zero Setup VSCode Intelligence

Mon Jul 2 2018 by Faris Masad

At Repl.it our goal is to provide state of the art in developer tools to everyone in the world, for free. When we started moving our product beyond a simple REPL and started adding IDE features, we had to invent standards and wrappers around every language tool for our frontend to consume. For every editor feature, say errors and warnings (linting), we had to extend our development protocol with a set of commands and data structures, and then teach our development containers how to wrap the given tool, say Pylint, and our frontend on how to consume it (say annotate the editor with errors and warnings). A similar thing has been happening with IDEs for the past few decades -- every editor had to come up with their in-house ad-hoc protocol, and every tool developer had to build adapters and wrappers for editors to consume.

Repl.it ❤️ React

Thu Jun 7 2018 by Amjad Masad

Despite the negative press covfefe around React.js when it first came out, I instantly fell in love with it. The thing I liked the most about it was the component model. Until then the JavaScript community has been trying for years to come up with the correct abstraction for creating reusable modules, but it was always leaky. Because React components are essentially functions, and because functions are the undisputed champion of reusable code, it worked out extraordinarily well. You don't need dependency-injection, or any other modularity hacks, you simply pass props! Also, the virtual dom made it so that components are, by default, protected from other components prying into their internals.

Repl.it: the IDE That Grows—from Playgrounds to Fullstack Apps

Tue Mar 13 2018 by Amjad Masad

At Repl.it we come to work every day to explore a single idea—what if programming just worked? What if instead of fiddling around with packages, configurations, and mismatching versions, you just open your IDE and start coding. What if developers can go from an idea to coding and shipping software with no time in between. What if teachers who want to teach programming don't have to also work as IT administrators. What if students can just code their homework without having to set up the development environment on every computer they wanted to code on.

Modular, fast, small: how we built a server-rendered IDE

Wed Feb 14 2018 by Mason Clayton

At Repl.it our mission is to make programming more accessible, which means our coding environment needs to be lightweight, load fast, and work from anywhere in the world. However, as with so many software projects that evolve with time, we accumulated some bloat (luckily, we haven't included a mail client yet) and quite a few ad-hoc hacks to glue everything together. In this post, we'll go over how we designed our new IDE to have a small core (everything is a plugin), to be easily customizable (even on the fly), and to server-render.

New in Repls: autosave, custom urls, and more

Sun Nov 12 2017 by Haya Odeh

We are always excited about launching new features and sharing with you, our dear users, what we’ve been up to. For the past few months, Amjad, Mason and I have been working hard and last night we quietly launched the new repl features. These features required a lot of infrastructure and data changes which is always tricky to execute. We ran into some technical difficulties last night with the data migration but was able to bring the site back up and things have been running relatively smoothly since then.

One more console

Thu Jun 1 2017 by Amjad Masad

Debugging web projects on Repl.it can be frustrating. Until today, there was no easy way to view your errors and console logs (unless you open your browsers' developer tools). But that's changing because we're introducing our new tabbed console view for environments that has graphics output (like Web and Python Turtle).

Model solutions

Fri Apr 21 2017 by Vitaly Pavlenko

There is a special moment in learning: when a student runs their code against the unit tests and finally sees all of them turn green. This moment of enlightenment means the student has just managed to create their own working solution to a difficult problem, and has made a step towards becoming a great programmer! Wouldn't it be cool to further enhance the student's knowledge by showing the student different approaches to tackle the same problem?

Distributed Websocket Rate Limiting

Sun Jun 26 2016 by Amjad Masad

Rate limiting is standard practice for services offering an API. It's used for both protecting against bad actors, for example, attempting DOS attacks and to simply enforce limits on the service. There are many resources on the web on how to implement a rate limiter in your favorite language/stack. However, I couldn't find anything on how to rate limit Websocket connections (they differ in that they are persistent connections).