Require.js expert

I'm going to assume that there aren't many require.js experts anymore but if you remember how this works, please step forward.

Can you tell me how require.js is supposed to work? I have to unblock the main thread which seema to be due to a require js ... Uhh bundle I'm going with bundle 🤫😅

I a know about web pack, rollup, some less well known bundles and system js, also common.js modules and esmodules if you need to draw comparisons