TruffleRuby - Hackdot

Re:TruffleRuby by vidarh on Wednesday April 01, 2026 @08:09AM (#47599744)

I'm surprised it's only 2-3x times quicker w/Truffle? Is that because it only encodes/decodes a single image at the time and incurs higher startup costs? Or do you mean 2-3x vs. an MRI alternative that calls into a native extension?

I'm curious whether this reflects MRI's improvements closing some of the gap or something else.

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Re:TruffleRuby by petercooper on Wednesday April 01, 2026 @10:19AM (#47601305)

I've not got the numbers to hand between versions, but YJIT in Ruby 4.0 did shift the needle a bit, so yes, some gap closing. I also forget what the warmup was like, but to get 2-3x somewhat more was needed than with YJIT.

(Both running identical pure Ruby code, no extensions, in a long-running test scenario, no setup each time.)

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Re:TruffleRuby by vidarh on Wednesday April 01, 2026 @10:33AM (#47601502)

Thanks for the detail. That is really a testament to how much better MRI has gotten...

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