Folks,
I’ve raised PR “request-structs.rkt : don’t need all of net/url #7” on
racket/web-server . Please could someone look at it for me?
When I want to use a serialized continuations in sandboxes, I need to
use the language web-server/lang/base, which performs the
transformations necessary for the serializable-continuations.
web-server/lang/base transitively requires:
abort-resume
manager
request-structs
net/url
The ‘net/url’ requirement brings in http-client and url-connect; which
between them bring in such fun stuff as: gunzip and openssl as well as
http.
If request-structs.rkt includes ‘net/url-structs’ instead, then we get a
much reduced collection of modules. This takes the memory footprint of
an empty (as can be) sandbox from:
9.21875 MB (with net/url)
to
5.46875 MB (with net/url-structs)
(See “find-sandbox-min-memory” below my signature,
and please excuse the hyper precision).
Thanks,
Tim Brown
----------------------------------------------------------------------
(define (find-sandbox-min-memory lower upper rv iterations)
(cond
[(zero? iterations) rv]
[else
(define trial (* (+ lower upper) 0.5))
(printf "attempt ~a:" trial)
(with-handlers
((exn:fail? (λ (x) (printf " too low: ~s~%" x)
(find-sandbox-min-memory trial upper rv (sub1
iterations)))))
(parameterize ([sandbox-eval-limits (list 60 trial)])
(make-evaluator 'web-server/lang/base '(void)))
(displayln " too high?")
(find-sandbox-min-memory lower trial trial (sub1 iterations)))]))
(find-sandbox-min-memory 5 20 #f 5)
----------------------------------------------------------------------
--
Tim Brown CEng MBCS <tim.br...@cityc.co.uk>
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