read-string performance C5 vs C6

Diego via Chicken-users <[email protected]> Mon, 17 Nov 2025 02:46:00 +0000

Newsgroups	gmane.lisp.scheme.chicken
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Hi all,

I was working on porting chicken-update from CHICKEN 5 to 6, and noticed that something like the following took quite a bit longer (around ~1s -> ~5s on my machine):

(http:call-with-input-request
 "https://eggs.call-cc.org/rss-5.xml"
 #f
 (cut read-string #f <>))

I thought it might be an http-client thing, but I replaced the cut read-string with void and the performance is similar, so I'm assuming read-string may be the issue here.

Could this be due to utf-8 strings? Is there any way to speed this up? It's not at all performance critical here; I'm just wondering.

Thanks,
Diego