Made a PR with the delegate optimization stuff. Just need to fix the builds now 😭 https://github.com/ruby/ruby/pull/10510
Optimized forwarding callers and callees by tenderlove · Pull Request #10510 · ruby/ruby

This patch optimizes forwarding callers and callees. It only optimizes methods that only take ... as their parameter, and then pass ... to other calls. Calls it optimizes look like this: def bar(a)...

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