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Re: Question about an error with ports
From: |
Olivier Dion |
Subject: |
Re: Question about an error with ports |
Date: |
Thu, 10 Mar 2022 18:46:34 -0500 |
On Thu, 10 Mar 2022, Zelphir Kaltstahl <zelphirkaltstahl@posteo.de> wrote:
> Just one question: Why is get-bytevector-some better than
> get-bytevector-n and specifying a number of bytes?
I haven't check the implementation details, but I think it's just a
question of buffering. `get-bytevector-n` will block just like
`get-bytevector-some` when the port is empty. The former will return up
to N bytes and the latter might return more than N bytes. The former
probably also lead to less memory allocation since N is known in
advanced, a singled allocation can be made, while the latter might do
multiple allocations. This can be useful depending on your usage of the
port. For example, you could make a web server that only accepts HTTP
body up to 4096 bytes (1 system page). This is what some web server
does I think.
There's also `get-bytevector-all`, but this would lead to more memory
usage and multiple allocations. Again, it depends on the usage.
Regards,
old
--
Olivier Dion
Polymtl
- Question about an error with ports, Zelphir Kaltstahl, 2022/03/09
- Re: Question about an error with ports, Olivier Dion, 2022/03/10
- Re: Question about an error with ports, Zelphir Kaltstahl, 2022/03/10
- Re: Question about an error with ports,
Olivier Dion <=
- Re: Question about an error with ports, Chris Vine, 2022/03/11
- Re: Question about an error with ports, Olivier Dion, 2022/03/11
- Re: Question about an error with ports, Chris Vine, 2022/03/11
- Re: Question about an error with ports, Olivier Dion, 2022/03/11
- Re: Question about an error with ports, Chris Vine, 2022/03/11
- Re: Question about an error with ports, Maxime Devos, 2022/03/11
- Re: Question about an error with ports, Maxime Devos, 2022/03/11
- Re: Question about an error with ports, Chris Vine, 2022/03/11
- Re: Question about an error with ports, Chris Vine, 2022/03/11
- Re: Question about an error with ports, Maxime Devos, 2022/03/11