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Test Suite Comments are entering closed beta today! If you have a Playwright test suite, send us an email) and we’ll set you up.

We’ve always been excited about making failing tests easier to debug. Nobody enjoys being blocked by a 🔴 badge in a PR. Scrolling through CI logs is frustrating. Figuring out why a random test failed is the worst.

Test Suite Comments are one of those features that you take for granted quickly. We added comments to our DevTools repo last week and within a day, everyone was using them and sharing replays in our Discord.

If you’re as excited as we are, reach out and we’ll help set you up. We’re just getting started too so watch this space!

Glide Case Study

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Glide is the easiest way to design data-driven applications. If you’re looking for a case study on how Replay helps you record the bug once and never worry about reproducing it again, this is for you!

🐌 “Before Replay we spent somewhere between 1–2 hours per day per dev in this reproducibility purgatory. The toll this was taking on our development velocity and our ability to respond and resolve issues was huge. We thought there must be a better way.” — Mark Probst, CTO

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Performance

5X Faster Scope Mapping One of the biggest differences between Replay and Chrome DevTools is that Replay maps Files, Call Stacks, Scopes and Expressions. This means that when you open a replay, add a print statement, and jump to a console log, everything just works. Under the hood, we use Babel to parse the original and generated files and map the source locations and scopes.

Previously we were using Babel’s default traversal API which has scopes built in, but in the extreme case it took 50 seconds. We’re now using their faster traversal API which takes 9 seconds.