After some testing, I'm fairly confident the issue I was seeing before isn't
happening now. After re-processing ~250 plugins a few times with the same
workers I was seeing significant slow-downs with large plugins. Also, if I was
listening to music in the browser it would start crackling and popping.
My hypothesis is that wee_alloc was causing a memory leak in the old version
which was causing browsers to freak out unless I recreated the workers on every
run. Though I'm not sure if that theory holds since I wasn't seeing out of
control memory usage in the dev tools. Perhaps wee_alloc just wasn't good at
managing memory after a certain number of allocate/deallocate cycles and was
putting a huge strain on the browser.
I'm hoping that reusing workers like this will also speed up processing and
possibly resolve some crashing that some users were seeing.