WebAssembly threads enable an application to make use of parallel threads running while sharing the same memory address space. This enables libraries and applications that rely on pthreads to be ported to run in the browser. This feature is being run under an origin-trial to solicit feedback from the developer community.
WebAssembly lets us extend the browser with new features. This article shows how to port the AV1 video decoder and play AV1 video in any modern browser.
Wasm allows you to run C code on the web.
With Chrome 60, you can now measure time to first paint and time to first contentful paint with the Paint Timings API. You can control how fonts are rendered with the font-display CSS property. WebAssembly has landed and there's plenty more!