Re: Reduce the instruction overhead of OpenSSL calls

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От Daniel Gustafsson
Тема Re: Reduce the instruction overhead of OpenSSL calls
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Msg-id 751A4F25-79A6-425B-8323-C626BD300875@yesql.se
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Ответ на Reduce the instruction overhead of OpenSSL calls  ("ryanewang(王蕾)" <ryanewang@tencent.com>)
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> On 27 Feb 2025, at 14:16, ryanewang(王蕾) <ryanewang@tencent.com> wrote:
>
> Hi,
> From the openssl documentation, when the value of ret is greater than 0, the SSL_get_error() function returns
SSL_ERROR_NONE. 
> So, it seems that when the return value of SSL_read() or SSL_write() function is greater than 0, we don't need to
makean error judgment.  
> The attached patch attempts to reduce unnecessary error judgments.

Calling SSL_get_error() is needed to clear the error queue for subsequent IO
operations, so I don't skipping it would be wise.  I imagine that any overhead
is dwarfed by the time spent in network IO anyways.

--
Daniel Gustafsson




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