Catching Flaky Tests Before It's Too Late

This is a guest post from Artem Zakharchenko, creator of MSWJS, an API mocking library for Javascript. He also writes about testing for EpicWeb and on his perso...

How I reduced an API call from >5 seconds to under 100ms

Given that 100% of the databases I have interacted with in my professional career have been SQL databases, my data-based mental model (please enjoy my pun) has ...

The New Way of React Native Debugging

This is a guest post from Simon Grimm, creator of Galaxies.dev, where Simon helps developers learn React Native through fast-paced courses and personal support....

How to reduce TTFB

TTFB (Time to First Byte) is a commonly used metric that measures the duration between a client's HTTP request and the receipt of the first byte of the server's...

Beyond Coverage: Flaky Test Detection, AI Test Generation, and More

We’re expanding beyond just code coverage and added a suite of new capabilities to help you break production less: AI PR Review, AI Test Generation, Test Analyt...

Fix slow sites faster with domain-specific Performance Insights, MongoDB support & Continuous Profiling on Sentry

Optimizing app performance can be challenging, even for seasoned developers. Frontends groan under the weight of bloated assets, backends lag from sluggish data...

AI-Powered Updates–Issue Grouping, Autofix, Anomaly Detection, and more

What if you could not only find software issues you care about but also have the fix ready? We just introduced several updates that intelligently group new issu...

Smarter search, Uptime Monitoring, and Session Replay updates to simplify your debugging

Whether it’s sitting through a meeting that should’ve been an email or reading a blog post written by AI 👀– no one enjoys losing time they’ll never get back. T...

Enabling Out-of-the-Box Performance Insights in Unity Games with the Sentry SDK

The Sentry Unity SDK has been effective for crash reporting, including: Support for line numbers in C# exceptions on IL2CPP (in release mode!) Capturing native ...

Avoid Rate Limiting with Query Batching

This post is part of our debugging series, where we share tricky challenges and solutions while building Sentry.  ~~~ On March 4th, 2024, the most metal inciden...

We Just Gave $750,000 to Open Source Maintainers

Sentry started out as an Open Source side project in 2008. Today we are a Fair Source company with 100,000+ organizations on our SaaS and $100M+ ARR, but we hav...

How we decreased P99s on our backend API requests by 3 seconds

At Sentry, we don't just build debugging tools for developers—we use them ourselves. This story demonstrates how we leveraged our own platform to solve a myster...

Distributed Tracing: A Powerful Mechanism for Application Debugging and Monitoring

Distributed Tracing is the process of tracking the flow and timing of requests as they pass through a system, which helps us understand the performance of that ...

6 Common Causes of Application Performance Issues

Application performance is critical for a seamless user experience, but all too often, developers find themselves struggling to pinpoint slowdowns. Understandin...

Automating tests and bug fixes with the Sentry extension for GitHub Copilot––because you have better things to do

TL;DR: The Sentry extension for GitHub Copilot now goes beyond chat to help you generate tests, surface issues, and suggests fixes all within your regular PR wo...

How to debug, log, and monitor performance in Node.js

You’re a good developer, that’s why when writing your Node.js application, you also wrote some unit tests to ensure your logic worked as expected. But what do y...

Debugging a Django Application

Debugging Django applications can be challenging, but it’s key to keeping your app running smoothly in production. From unexpected bugs to performance slowdowns...

Guide to Error & Exception Handling in React

No app is perfect. Even if we try our best to test all possible cases, sometimes things will go wrong. It only takes one failing request to get you in trouble. ...

Meet Sentry’s 2024 Summer Interns

Here at Sentry, we recognize the value of the fresh perspectives and innovative ideas that summer interns bring to the table. By offering internships, Sentry ho...

What’s the difference between API Latency and API Response Time?

Imagine waiting more than a few seconds for a page to load. Or even worse, imagine waiting more than a few seconds every time you perform any action in an app o...

Downtime happens, fix it faster - Uptime monitoring now in open beta

That moment when everything’s running smoothly—users engaged, conversions flowing—until your site takes a break, and you find out from a tweet. We’ve all been t...

Join the Pledge

Today we officially launch the Open Source Pledge. The Pledge started as an idea some years back: what if we could give back to Open Source on behalf of every e...

Atomic Repositories in Clean Architecture and TypeScript

You’re checking out on an e-commerce site. You have a cart with several items and quantities, and you click the checkout button. Under the hood, the operation f...

Debugging a Slack Integration with Sentry’s Trace View

While building Sentry, we also use Sentry to identify bugs, performance slowdowns, and issues that worsen our users’ experience. With our focus on keeping devel...

Observability and Tracing: How to Improve Your Debugging Workflow

Having the right tools to support debugging is crucial for improving application performance and delivering an enhanced user experience. Traditional observabili...

Sentry can’t fix React hydration errors, but it can really help you debug them

Hydration failed because the initial ui does not match what was rendered on the server. Don’t you just love hate it when that happens? If you’re building server...

Why Clean Architecture makes debugging easier

Let’s start with things we already know - complex projects are inherently hard to debug. The more complicated they are, the harder it is to debug them. The size...

How to Improve Your React Debugging Process

In this guide, you’ll gather how to identify and solve the most common bugs and performance issues. We’ll cover debugging client-side React, if you have a React...

Replaying Backend Errors using Sentry’s Session Replay

Session Replay is a powerful visual tool that captures user interactions, providing insights into the actions that resulted in errors. It records various activi...

How to Improve Your Android Debugging Process

Debugging Android apps has its unique challenges with crashes, ANRs, and inconsistent logs. But there are some easy ways to quickly identify and resolve issues,...

Everyone needs to know how to trace

It’s a bold claim for me to say that every developer can benefit from something 40% of them haven’t heard of, but hear me out. I was among the 40% who didn’t kn...

How to make your web page faster before it even loads

As developers (and as front end developers in particular), we usually talk about web performance in the context of measuring what happens when we start to see t...

Cancel the (Issue) Noise

For those who like to get straight to the point, here’s a quick summary of the latest noise-reducing improvements to the Issues experience: AI Grouping – availa...

Monitoring Twilio’s Flex Agent Desktop with Sentry

Twilio Flex is a React-based web app that lets you run your contact center as a service, and years ago, while working at a previous company, I was tasked with s...

How I cut 22.3 seconds off an API Call using Trace View

Dan Mindru is a Frontend Developer and Designer who is also the co-host of the Morning Maker Show. Dan is currently developing a number of applications includin...

Sentry is now Fair Source

Today we’re launching Fair Source, a new approach to software sharing that is safe for companies to adopt and developers to use. Before Fair Source, companies t...

How to Fix Source Map Upload Errors

Implementing a stack trace that lacks your source code and all the variables and function names is like putting together a jigsaw puzzle without a reference pic...

Debug (even) faster with 8 Sentry updates

Over the past few months, we introduced several new features and capabilities. While we released larger product updates like Trace Explorer, Insights modules, a...

Debuggability Explained - Monitoring & Observability in Your Workflow

Monitoring tools are great at letting you know when something is broken and the overall impact. We should know, we make an error monitoring tool. Observability ...

How to identify fetch waterfalls in React

Fetch Waterfalls are scenarios where multiple fetch requests are invoked in a sequential manner, not in parallel. This leads to some serious performance degrada...

Custom Performance Metrics: Tips from Etsy’s Performance Team

Geoff Graham is a frontend engineer, designer, and teacher. He is also a writer and editor for Smashing Magazine and often consults with companies on web strate...

Announcing Session Replay for Mobile – in Open Beta

Session Replay for iOS, Android, and React Native is now in open beta. If you already know what Session Replay is, amazing – click the link and update your SDK ...

Debugging slow pages caused by slow backends

As a developer, what should your reaction be when someone says your website is slow to load? As long as you don’t say, “I just let my users deal with it”, you’r...

Get Insights into backend infrastructure with Caches, Queues, Requests, & Queries

To create exceptional products, developers need to understand the behavior of backed systems; however, we generally have the most control over the applications ...

Debug Third-Party APIs with Requests

The internet is basically just a bunch of websites calling each other. You make a call to some service, that service calls you back, and then that service goes ...

AI Application Insights with Sentry LLM Monitoring

The data you need to monitor AI-powered applications differs from other parts of your tech stack. Whether you need to debug an error, improve performance, or be...

Introducing Insights: Tailored debugging workflows for your application

You’re seeing an unusually high number of 429 status codes, but your monitoring solution can’t tell you much beyond that. Typically, that’s when you start searc...

Logging in Python: A Developer’s Guide

Have you ever had a tough time debugging your Python code? If yes, learning how to set up logging in Python can help you streamline your debugging workflow. As ...

Your bad LCP score might be a backend issue

Largest Contentful Paint (LCP) is a Core Web Vital (CWV) metric that marks the point in the page load timeline where the main page content has likely finished l...

Fix issues without user input with Session Replay

Dan Mindru is a Frontend Developer and Designer who is also the co-host of the Morning Maker Show. Dan is currently developing a number of applications includin...

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