Increase App Performance — Tame Tag Managers and Take Back Control From Third-Parties

Zack Jackson
Oct 6, 2020 · 12 min read

Javascript application performance can be tricky, even if the application has been well-tuned for speed — there’s a big area that engineering does not own and has little control over.

It’s the tag manager and third party code in general.

I can get an app to load and finish in 2 seconds. But with all the vendor code, the reality is usually a 2–3 additional seconds. There’s not much room for improvement left within the JS app itself.