Did you know? Optimizely bundles together all of your experiment and variation code into one big bundle, and loads it on every page on your site which uses Optimizely.
This is a cool visualization to show how much your Optimizely test adds to page load time.
https://joeframbach.github.io/optisizely
This is entirely static, no api or dynamic content. Just run whichever static server you want. Python's SimpleHttpServer, npm install http-server, etc.