While we are at it, will it be better to rewrite 'fold-packages' and similar things (like 'search') using streams?
For example:
#:use-module (ice-9 streams)
[...]
(define (fold-packages-lazy proc init)
"Call (PROC PACKAGE RESULT) for each available package, using INIT as
the initial value of RESULT."
(stream-fold
(lambda (module result)
(stream-fold (lambda (var result)
(if (package? var)
(proc var result)
result))
result
(list->stream
(module-map (lambda (sym var)
(false-if-exception (variable-ref var)))
module))))
init
(list->stream (package-modules))))
'time' shows that the above is a bit slower than the current version.
Will it be faster when we have more packages? What about memory?
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