New in Calibre: JavaScript parse
and compile runtime metrics
After a busy November, we’re pleased to let you know that Calibre will now help you understand another vector of web performance.
🏃♀ JavaScript runtime metrics
Runtime execution of JavaScript is what we’ve identified as a major hidden cost for performance on the web. Up until recently, the web performance community hasn’t had a firm grasp on the reporting of these crucial metrics outside of browser dev tools. No more!
If you’ve had a hunch that a particular ad network, tracking script or chat system is slowing down your site, wonder no more. 🎯
📱New test profiles
Test profiles are how Calibre splits up device and bandwidth tests — here are a few small updates to help you test devices more thoughtfully.
First up, when creating a site, the new default profile arrangement will be:
- Chrome Desktop with an unthrottled network connection
- Motorola Moto G4, with a 3G connection
Previously we were using an iPhone 6 instead of a Moto G4, but after some reflection, we wanted to provide a default profile that better described a global average smartphone.
There are two new test profile devices to choose from: iPhone 7 and iPhone 8. These more modern phones have extremely fast CPUs and offer near-desktop JavaScript performance.
Help us spread the word about Calibre
As always, we’d love to see more companies using Calibre to help make the web a faster place. If you can help spread the word, that’d mean the world to us. 🤗
