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Re: overwriting an existing file is much slower than creating a new one
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From: |
Kai Torben Ohlhus |
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Subject: |
Re: overwriting an existing file is much slower than creating a new one |
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Date: |
Tue, 9 Jun 2020 14:17:38 +0900 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.8.0 |
On 6/6/20 10:21 AM, Dmitri A. Sergatskov wrote:
> I just noticed that saving/overwriting into existing file is much slower
> that creating a new one:
>
> octave:1> xxx = repmat (ones(2000), [1,1,4,10]);
> octave:2> tic; save xxx1.oct xxx -binary; toc
> Elapsed time is 0.835598 seconds.
> octave:3> tic; save xxx1.oct xxx -binary; toc
> Elapsed time is 3.52093 seconds.
> octave:4> tic; save xxx1.oct xxx -binary; toc
> Elapsed time is 3.47683 seconds.
>
> Does it have to be?
>
> Dmitri.
> --
>
On my laptop system "openSUSE 15.1, XFS /home partition on SSD drive" I
do not see that drastic differences between Octave 5.2.0, 6x, and 7x as
you observed. They are all about this:
Elapsed time is 1.06028 seconds.
Elapsed time is 1.1914 seconds.
Elapsed time is 1.18887 seconds.
Kai