Ha! Not sure if you've seen it, but we offer native SDKs for iOS, Android, Windows, macOS and Linux. Our Web SDK also has a version that uses PSPDFKit Server via a Docker container to get faster performance.

The performance difference to native is smaller than you might think though - see our post from a few months back: https://pspdfkit.com/blog/2017/webassembly-a-new-hope/

PSPDFKit for Web Standalone is a great choice for an easy-to-deploy web viewer, annotation editor and form filler, and performance is great. Definitely better than pdf.js - which is typically where people start with, before they upgrade to PSPDFKit for Web.