Re: poor performance while processing a file one byte a time

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From	Arno Welzel <usenet@arnowelzel.de>
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Subject	Re: poor performance while processing a file one byte a time
Date	Thu, 20 Jan 2022 20:27:32 +0100
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Mateusz Viste:

> On Thu, 20 Jan 2022 19:23:49 +0100
> Arno Welzel <usenet@arnowelzel.de> wrote:
[...]
>> However this may still be quite slow on larger files. Since it seems
>> you want to create some kind of checksum based on the file content,
>> you may want to use something else like hash_file(), sha1_file() or
>> md5_file() and use the result of these calls instead processing the
>> whole file content in a loop.
> 
> Sadly, that won't work. The kind of checksum I am computing is not
> supported by PHP, hence why I do it byte by byte myself. Another
> solution is to do it with my C code by system()-calling it from PHP,
> but that's really ugly. At this point I'd rather stick with a slow, 100%
> PHP solution.

Or you create your own PHP extension which can then be used in the
script ;-)


-- 
Arno Welzel
https://arnowelzel.de

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poor performance while processing a file one byte a time Mateusz Viste <mateusz@xyz.invalid> - 2022-01-20 15:16 +0100
  Re: poor performance while processing a file one byte a time John-Paul Stewart <jpstewart@personalprojects.net> - 2022-01-20 11:08 -0500
    Re: poor performance while processing a file one byte a time Mateusz Viste <mateusz@xyz.invalid> - 2022-01-20 17:23 +0100
      Re: poor performance while processing a file one byte a time John-Paul Stewart <jpstewart@personalprojects.net> - 2022-01-20 12:38 -0500
        Re: poor performance while processing a file one byte a time Mateusz Viste <mateusz@xyz.invalid> - 2022-01-20 19:49 +0100
    Re: poor performance while processing a file one byte a time Mateusz Viste <mateusz@xyz.invalid> - 2022-01-20 17:37 +0100
      Re: poor performance while processing a file one byte a time John-Paul Stewart <jpstewart@personalprojects.net> - 2022-01-20 12:41 -0500
        Re: poor performance while processing a file one byte a time Mateusz Viste <mateusz@xyz.invalid> - 2022-01-20 19:47 +0100
  Re: poor performance while processing a file one byte a time Arno Welzel <usenet@arnowelzel.de> - 2022-01-20 19:23 +0100
    Re: poor performance while processing a file one byte a time Mateusz Viste <mateusz@xyz.invalid> - 2022-01-20 19:45 +0100
      Re: poor performance while processing a file one byte a time Arno Welzel <usenet@arnowelzel.de> - 2022-01-20 20:27 +0100

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