Okay, port your existing Ruby code to a compiled language, giving it multiple times the speed? Maybe three is a slight business opportunity here.
Also, give your developers a more productive language that can go where Ruby can't (like OS development), which is 90% instantly recognizable — may also be worth something?
Is it really so hard to port Ruby code to any of the languages I mentioned? Even with Crystal you will still have to make changes to your code, is having to use a slightly different syntax such a big difference? If you've got Ruby code and you haven't already ported it, how badly do you need the speed?
Well it seems most developers here would rather use Ruby + several memory-optimised VM clusters to make their services go faster and destroy their balance sheet than to use a faster language that is efficient in memory and is also blazing fast.
A rewrite in (other fast language) from Ruby sounds ridiculous as soon as you include writing a extra FFI wrapper around this you have to maintain so that would be out of the picture and that sounds a lot harder than a semi 1:1 port of the source code.
The trouble is Ruby itself is starting to become a sunken cost as a language but is survived because of Rails, thus also explains the countless memory issues that happen when developers use it. So for a stopgap to something sort of better, I would rather port to Crystal or Elixir so I can run on those low-cost VMs and save cash.
Also, give your developers a more productive language that can go where Ruby can't (like OS development), which is 90% instantly recognizable — may also be worth something?