Re: File output and buffering

["Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>]

On Wed, 20 Aug 2008 01:59:52 -0700 (PDT), Maciej Sobczak wrote:

> On 20 Sie, 10:43, Maciej Sobczak <see.my.homep...@gmail.com> wrote:
> 
> Still valid question:
> 
>> 3. Why is buffered Ada.Text_IO as slow as non-buffered C's stdio? Who
>> is eating the 20x factor?

Because of page formatting, I suggest. You can use text streams instead.
[But don't use String'Write! Although, the newest GNAT optimized that,
AFAIK.]

BTW, buffering does not make I/O faster. It obviously does the opposite.
Certainly, you didn't mean the "last-mile" buffer held by the driver, which
is usually inaccessible. In some elder OSes you could directly write from a
user buffer mapped by the kernel, have record files etc. That was *fast*.
But then came C, Unix and Co., you know... (:-))

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de