Re: Support getrandom() for pg_strong_random() source

Jacob Champion <jacob.champion@enterprisedb.com> writes:

> On Mon, Jul 28, 2025 at 6:30 PM Michael Paquier <michael@paquier.xyz> wrote:
>
>> Could getentropy() be more efficient at the end on most platforms,
>> meaning that this could limit the meaning of having a GUC switch?
>
> I don't know. [2] implies that the performance comparison depends on
> several factors, and falls in favor of OpenSSL when the number of
> bytes per call is large
[...]
> [2] https://dotat.at/@/2024-10-01-getentropy.html

Note that that test was done on an older Linux kernel without the vDSO
implementation of getentropy(), so on newer kernel (>=6.11) and glibc
(>= 2.41) versions the difference might be smaller or the other way
around.


- ilmari