I was working in Varying Vagrant Vagrants and for some reason the site I was working on was starting to load extremely slowly after a certain amount of time. Not being able to pinpoint the causes, I dumped VVV (which uses a lot of additional technology and configuration) in favor of Vagrant. On Vagrant I installed a bare-bones box with just the minimum required software and configurations. I simplified the environment. This helped me deal with the problem much better than before.