Enabling YJIT comes at the cost of using a noticeable amount more memory so it might be tricky to get going on a single server deploy that runs let's say Puma, Sidekiq and Action Cable (3 processes) on a $10 or $20 a month VPS.

But the good news is in Ruby 3.3 they are working towards reducing memory consumption even more. Someone from Shopify recently tweeted this in response to a question I asked about memory consumption:

> Our goal is to make the memory concern of YJIT to not be a thing for Ruby 3.3 anyway, so this really shouldn't be much of a concern

That's really exciting news. I mean it's already a huge deal to have YJIT and is worth using but now it's looking like a zero downside win all around and there's going to be no reason not to enable it.