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Re: [PATCH 5.1] zread: read files in 4k chunks

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  Re: [PATCH 5.1] zread: read files in 4k chunks Ilkka Virta <itvirta@iki.fi> - 2020-06-22 23:16 +0300

#16433 — Re: [PATCH 5.1] zread: read files in 4k chunks

On 22.6. 19.35, Chet Ramey wrote:
> On 6/22/20 1:53 AM, Jason A. Donenfeld wrote:
>> Currently a static sized buffer is used for reading files. At the moment
>> it is extremely small, making parsing of large files extremely slow.
>> Increase this to 4k for improved performance.
> 
> I bumped it up to 1024 initially for testing.

It always struck me as odd that Bash used such a small read of 128 
bytes. Most of the GNU utils I've looked at on Debian use 8192, and a 
simple test program seems to indicate glibc's stdio reads 4096 bytes at 
one read() call.

-- 
Ilkka Virta / itvirta@iki.fi

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