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by zelphirkalt 1396 days ago
From what I have read, Chez is a quite performant implementation (benchmarks https://ecraven.github.io/r7rs-benchmarks/) and does a lot of things correctly (according to spec) and cleanly. Basing Racket on Chez takes advantage of the things Chez does well and probably saves a lot of time. I have too little knowledge about Racket's internals, to give a better and less general answer.