Does it affect Crystal language as well?
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Well since Crystal uses llvm, I think it is also impacted.
Interesting read though
If attacks on side channels are a concern high level interpreted languages might not be a good fit for your project. To get around those you’ll generally need to use lower level languages like C or Assembly to code in a “safe way”. Overtime I’m sure Crystal and LLVM will add some mitigations but consider your threat model.