Dan Shappir

Comparing JavaScript frameworks performance using real-world data

Dan Shappir Performance Tech Lead NEXT Insurance

Dan Shappir is the Performance Tech Lead at NEXT Insurance, and previously held that position at Wix.com. Dan has over 25 years of software development experience, and has worked on systems ranging from multiuser games to missile trajectory simulations to designing and building large-scale Web applications used by hundreds of millions of users. He is a frequent speaker at technical conferences, a host and panelist on the JavaScript Jabber podcast, and an Invited Expert on the W3C Web Performance Working Group. Dan holds an MSc in Computer Science.

Comparing JavaScript frameworks performance using real-world data

Google collects performance information from all sessions on opted-in Chrome browsers into its Chrome User Experience Report (CrUX) database. It then uses this information as a ranking factor for its search engine, but it also makes this information publicly available for everyone to view. I used this data to analyze and compare the performance of the leading JavaScript frameworks. In particular, I looked at the likelihood that websites using each framework will have good Core Web Vitals (CWV) scores. Along the way I encountered several surprising results, and solved at least one mystery. See how your favorite framework ranks vs all the rest!

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