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Re: cast problem in code conversion
From: |
Kenichi Handa |
Subject: |
Re: cast problem in code conversion |
Date: |
Tue, 28 Dec 2004 10:53:27 +0900 (JST) |
User-agent: |
SEMI/1.14.3 (Ushinoya) FLIM/1.14.2 (Yagi-Nishiguchi) APEL/10.2 Emacs/21.3.50 (sparc-sun-solaris2.6) MULE/5.0 (SAKAKI) |
In article <address@hidden>, Juri Linkov <address@hidden> writes:
> Kenichi Handa <address@hidden> writes:
>> In article <address@hidden>, YAMAMOTO Mitsuharu <address@hidden> writes:
>>> Calculation of the value of `ratio' in `code_convert_region' is
>>> missing a cast to float. That makes the result inaccurate.
>>
>>> In Emacs 21.2, the part in question was as follows:
>>> float ratio = coding->produced - coding->consumed;
>>> ratio /= coding->consumed;
>>
>>> But in Emacs 21.3,
>>> ratio = (coding->produced - coding->consumed) / coding->consumed;
>>
>>> Reverting this change drastically improves performance when opening a
>>> large binary file. For example, opening the Emacs executable becomes
>>> 6 times faster for me.
>>
>> Thank you for finding this bug. I've just installed a fix.
> Now visiting large files is much faster! Is it possible that
> emacs-unicode which still takes too much time to open large files,
> suffers from a similar problem?
I think no. I have not yet tuned code conversion of
emacs-unicode that much. I think there's a lot of rooms to
improve performance in emacs-unicode for no-converion,
raw-text, utf-8 decoding/encoding.
---
Ken'ichi HANDA
address@hidden