Since 2015 I have been lucky to collaborate with more than a hundred teams building PWAs and consult on some of the world's largest sites. Engineers and managers on these teams universally want to deliver great experiences and have many...

If you work on a browser, you will often hear remarks like, Why don't you just put [popular framework] in the browser? This is a good question — or at least it illuminates how browser teams think about tradeoffs. Spoiler: it's gnarly....

Note: This post first ran as part of Sergey Chernyshev and Stoyan Stefanov's indispensible annual series. It's being reposted here for completeness, but if you care about web performance, make sure to check out the whole series and get...