Message 410739 - Python tracker

Message410739

Author	gregory.p.smith
Recipients	gregory.p.smith, mark.dickinson
Date	2022-01-17.03:04:11
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1642388652.04.0.876084102342.issue46406@roundup.psfhosted.org>
In-reply-to

Content
I tested my PR branch on 32-bit arm (raspbian bullseye) and the microbenchmark timing shows no change (within the noise across repeated runs). Unsurprising as division is entirely different on 32-bit arm. Raspbian uses armv6 for compatibility with the original rpi and rpi0. armv6 does not have an integer division instruction. (how RISCy of it) But that doesn't make a difference in this code as the final 32-bit arm ISA, armv7-a, only has a 32:32 divider. (armv8 aka aarch64 is 64-bit and uses a UDIV as one would expect) anyways, that satisfies me that it isn't making anything worse elsewhere.

Content

I tested my PR branch on 32-bit arm (raspbian bullseye) and the microbenchmark timing shows no change (within the noise across repeated runs).  Unsurprising as division is entirely different on 32-bit arm.

Raspbian uses armv6 for compatibility with the original rpi and rpi0.  armv6 does not have an integer division instruction. (how RISCy of it)  But that doesn't make a difference in this code as the final 32-bit arm ISA, armv7-a, only has a 32:32 divider.  (armv8 aka aarch64 is 64-bit and uses a UDIV as one would expect)

anyways, that satisfies me that it isn't making anything worse elsewhere.

History
Date	User	Action	Args
2022-01-17 03:04:12	gregory.p.smith	set	recipients: + gregory.p.smith, mark.dickinson
2022-01-17 03:04:12	gregory.p.smith	set	messageid: <1642388652.04.0.876084102342.issue46406@roundup.psfhosted.org>
2022-01-17 03:04:12	gregory.p.smith	link	issue46406 messages
2022-01-17 03:04:11	gregory.p.smith	create