Seems to hang on infinite sequences

[tekacs]

Replication steps

user.clj:

(ns user
  (:require [nextjournal.clerk :as clerk]))

(clerk/serve! {:watch-paths ["notebooks"]})

notebooks/tester.clj:

(range)

This seems to hang, rather than handling the infinite sequence as expected and called out in the example here:

clerk/notebooks/viewer_api.clj

Line 12 in fd79f75

(range)

Clerk server launched with Calva's jack-in, with no other dependencies. The Clerk server seems to just stop responding to updates.

On the other hand (range 100) seems to work fine.

[mk]

Hey, thanks for the report! Clerk currently has a condition to not cache things that execute in under 1ms, see

clerk/src/nextjournal/clerk.clj

Lines 66 to 67 in fd79f75

	(defn worth-caching? [time-ms]
	(<= 1.0 time-ms))

and

clerk/src/nextjournal/clerk.clj

Line 107 in fd79f75

(let [no-cache? (not (worth-caching? time-ms))]

Could you maybe experiment with raising that limit and printing the time in order to find out what a better threshold is?

I think we might also want to put some limits in place so we by default don't try to freeze uncountable seqs with a very large number of items.