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Re: Bug: org-babel-expand-noweb-references is very slow [9.1.9 (release_
From: |
Nicolas Goaziou |
Subject: |
Re: Bug: org-babel-expand-noweb-references is very slow [9.1.9 (release_9.1.9-65-g5e4542 @ /usr/share/emacs/26.3/lisp/org/)] |
Date: |
Wed, 08 Jan 2020 18:23:10 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/26.3 (gnu/linux) |
Hello,
Vladimir Nikishkin <address@hidden> writes:
> I am attaching the file in which tangling is still slow.
>
> The file is quite big, but that alone doesn't seem to be the reason
> for slowliness (I tried adding 1M-long words in the random places of
> the previous mwe).
>
> You can see the result by C-c C-v C-v'ing the code block at the
> "Ramanujan numbers" heading.
>
> Below is the profiler report for C-c C-v C-v'ing.with the heaviest
> blocks expanded:
This is because you're using :noweb-ref, which _is_ slow, although you
apparently don't need it in the document. Use name keyword instead,
e.g.,
#+name: primetest
#+begin_src scheme :exports both :results output
(define (smallest-divisor n)
(find-divisor n 2))
(define (find-divisor n test-divisor)
(cond ((> (square test-divisor) n) n)
((divides? test-divisor n) test-divisor)
(else (find-divisor n (+ test-divisor 1)))))
(define (divides? a b) (= (remainder b a) 0))
(define (prime? n)
(= n (smallest-divisor n)))
#+end_src
Regards,
--
Nicolas Goaziou