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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2022/05/23 18:49:22 UTC

[GitHub] [arrow-datafusion] tustvold commented on pull request #2587: Evaluate JIT'd expression over arrays

tustvold commented on PR #2587:
URL: https://github.com/apache/arrow-datafusion/pull/2587#issuecomment-1135022377

   I think it is important to understand what cranelift is, and what it isn't. Cranelift is a code generator originally intended to take optimised WASM and convert it to native code. It is **not** an optimising compiler like LLVM.
   
   I could see it being very well suited for doing runtime monomorphisation, i.e. removing conditional branches. I think it will struggle to out-perform the kernels in arrow-rs, some of which are hand-rolled and all of which benefit from LLVM compilation.


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