Date: Sat, 04 Jul 2020 14:09:46 +0900 (JST) From: Hiroki Sato <hrs@FreeBSD.org> To: 0mp@FreeBSD.org Cc: timp87@gmail.com, freebsd-ports@freebsd.org, manu@FreeBSD.org Subject: Re: set_rcvar() function use? Message-ID: <20200704.140946.1661194655626577558.hrs@FreeBSD.org> In-Reply-To: <34921b6e-ce3a-13e4-0cc1-3ca47b5a9cef@FreeBSD.org> References: <CAAoTqfss_-=N4EGd=XKDA%2BtzqvK5YZ7Ci6QJZvvip2xc64fYrw@mail.gmail.com> <20200703.035403.856368268140192104.hrs@FreeBSD.org> <34921b6e-ce3a-13e4-0cc1-3ca47b5a9cef@FreeBSD.org>
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----Security_Multipart(Sat_Jul__4_14_09_46_2020_621)-- Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Mateusz Piotrowski <0mp@FreeBSD.org> wrote in <34921b6e-ce3a-13e4-0cc1-3ca47b5a9cef@FreeBSD.org>: 0m> > I am planning to revisit the multi-instance support shortly because I 0m> > am using it for a long time and I think it is useful. While I did 0m> > not receive a strong objection to it so far, it is also true that 0m> > adopting the set_rcvar() style was not discussed properly. I would 0m> > like more feedback before moving forward. 0m> 0m> AFAIR, manu@ was concerned at some point that using set_rcvar() extensively 0m> might result in slowdowns on embedded systems. A discussion in the past about the performance was an additional fork(2) when using set_rcvar() for rc_var=`set_rcvar`. The use case of the resurrected one is "set_rcvar A B" as a replacement of "A=B", and it does not involve a subshell. I agree that the performance perspective should also be discussed, though. The current rc.subr and network.subr already have more expensive operations, so we might want to gather profiling information. -- Hiroki ----Security_Multipart(Sat_Jul__4_14_09_46_2020_621)-- Content-Type: application/pgp-signature Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- iMoEABMKAC4WIQRsDSNTJ8+Ax5Ae/dLbsH3Gbx9zfwUCXwAPGhAcaHJzQGZyZWVi c2Qub3JnAAoJENuwfcZvH3N/zxkCCQH66bdWDZ2aLTx4xHzTtw7T6wWNMtatuVoH qAngO26Vgpa+ZScyAmdcsSqEKVmXPhdd1B0VHL7yUJvj+oSY1vCMRgIJAX/LMSyn +7GFU9DayqcQ5O5M36pUnDTuEexePTrhJaozq0Pe82M2U7eY7CvGcuS5YTwEzDBF nTbxXHWh764R2+jO =e0Wo -----END PGP SIGNATURE----- ----Security_Multipart(Sat_Jul__4_14_09_46_2020_621)----
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