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From: Thierry Banel <tbanelwebmin@free.fr>
To: emacs-orgmode@gnu.org
Subject: Re: spee-up table refresh
Date: Mon, 09 Jan 2017 23:27:49 +0100	[thread overview]
Message-ID: <58740E65.10509@free.fr> (raw)
In-Reply-To: <87pojxyw2t.fsf@nicolasgoaziou.fr>

Le 09/01/2017 00:24, Nicolas Goaziou a écrit :

> Note that recalculating a table is inherently quadratic.

Well, on the test-case your change made recalculation linear (which is
good):

|  rows | seconds |
|-------+---------|
|  1000 |     1.5 |
| 10000 |      13 |
| 20000 |      25 |
| 30000 |      37 |

>
>> Here is a test case.
>>
>> 1- First create a 1000 row table:
>>
>> #+BEGIN_SRC elisp :results none
>>   (goto-char (point-max))
>>   (let ((i 1000))
>>     (while (> i 0)
>>       (insert (format "| %4s | |\n" i))
>>       (setq i (1- i))))
>>   (insert "#+TBLFM: $2=$1*10\n")
>> #+END_SRC
>>
>> 2- Then, with point in the table, type C-u C-c *
> I limited calls to `org-element-at-point'. It should be much faster now.
> Thank you.
>

And you did so through an impressively light change: swapping two lines
with a test on `suppress-analysis'.

Thanks and regards.
Thierry

      reply	other threads:[~2017-01-09 22:27 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-01-08 17:28 spee-up table refresh Thierry Banel
2017-01-08 23:24 ` Nicolas Goaziou
2017-01-09 22:27   ` Thierry Banel [this message]

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