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.
...what. why would I want that over a library that I can do whatever I want with?
Also why would I want to download an entire pdf engine when i already have an AOT version? (Stealing that phrasing by the way :) )
It's also quite basic when it comes to forms and often loses data.
For cases where more performance is required we always recommend using PSPDFKit Server, so PDFs render in native code on a high-power machine, and very likely using cached tiles.
I never asked for that though, so there's that.
https://www.theregister.co.uk/2016/10/24/apple_security_upda...