Improving frontend performance is a key focus area for us, and while we started this specific initiative recently, we have started prefetching data while our Vue app is loading (https://gitlab.com/gitlab-org/gitlab/-/issues/220511) and will be splitting out page specific assets out of the main bundle (https://gitlab.com/groups/gitlab-org/-/epics/3694).
We have quite a few other initiatives in flight, and will continue to provide updates on progress which you can see here: https://gitlab.com/groups/gitlab-org/-/epics/3273#note_37091...