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Performance Monitoring

How to make your web page faster before it even loads

Performance Monitoring
As developers (and as front end developers in particular), we usually talk about web performance in the context of measuring what happens…
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Monitoring Twilio’s Flex Agent Desktop with Sentry

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

Performance Monitoring
Few things are more frustrating than an API that's slower than molasses. You know the code works, but you know it can’t possibly be a good user experience anymore.
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Monitoring, Observability, & Debuggability Explained

Performance Monitoring
Monitoring tools are great at letting you know when something is broken and the overall impact. We should know, we make an error monitoring…
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From LCP to CLS: Improve your Core Web Vitals with Image Loading Best Practices

Performance Monitoring
If you’re a front end developer, there’s a high probability you’ve built (or will build) an image-heavy page. And you’ll need to make it…
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Responsive Images: A cheap trick to improve page performance

Performance Monitoring
Being a frontend developer, I’m always looking for ways to improve page load and render time performance issues. One of my biggest…
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Choosing the Right Metric: A Guide to Percentiles and Averages

Performance Monitoring
Not sure which performance metric to use to measure your application performance? Don’t worry – you’re not alone. With a wide variety of…
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End-to-end monitoring for web and mobile applications with Sentry

Performance Monitoring
You can identify and fix performance issues quickly by monitoring your applications “end-to-end” using Sentry performance monitoring and…
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Deconstructing Distributed Tracing

Performance Monitoring
Distributed Tracing is a powerful debugging tool for micro service architectures. In this article we're going to learn what distributed tracing is through breaking it down into smaller concepts and rebuilding it from scratch.
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Sentry Profiling now supports Browser Javascript, React Native, and Ruby

Performance Monitoring
Profiling is an essential component of a developer’s toolkit for identifying and addressing the thorniest performance bottlenecks. Whether…
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Code Refactoring and why you should refactor your code

Performance Monitoring
Software does not expire, but it “rots”. Its quality degrades over time. As you build your project and add features, you probably won’t…
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Web Fonts and the Dreaded Cumulative Layout Shift

Performance Monitoring
How frustrating is it when you’ve just landed on a web page, you click on a certain element and an ad or something else pops up and you end up clicking that thing instead? That’s a layout shift, which is bad for the user’s experience and the later they happen, the worse it is.
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Tame the performance of code you didn't write: A journey into stable diffusion

Performance Monitoring
In our daily lives as developers, we have to deal with a lot of code that we did not write ourselves (or wrote ourselves but already forgot…
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Profiling Beta for Python and Node.js

Performance Monitoring
A couple months ago, we launched Profiling in alpha for users on Python and Node.js SDKs — today, we’re moving Profiling for Python and Node…
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Application Profiling for Node.js

Performance Monitoring
Profiling is an important tool in every developer’s toolkit because it provides a granular view into the execution of your program from your…
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How Sentry uncovered an N+1 issue in djangoproject.com

Performance Monitoring
Sentry recently launched Performance Issues, a feature to help developers discover and fix common performance problems in their projects. We…
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Code-level Application Monitoring for Every Developer

Performance Monitoring
This content is out of date Since this blog post has been published we’ve evolved the feature to reduce complexity of configuration and…
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Performance Issues: Slow you can act on quick(ly)

Performance Monitoring
We’ve experimented and iterated (a few times) to finally bring the actionability that was once only reserved for errors to Performance.
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