I know Racket was reworked to build upon Chez Scheme several years ago. If the HN migration to CL was due to performance reasons, I wonder if sticking it out and waiting for the Chez version of Racket would have paid off.
I’m curious: was Arc running Racket BC or CS? I understand it got a big performance boost after switching to Chez Scheme.
dang: It was running BC. I had high hopes for switching to CS because I'd heard the same thing you had, but when I tried it, HN slowed to a crawl. This stuff is so unpredictable.
here:
https://news.ycombinator.com/item?id=47140657