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From: Eli Zaretskii <eliz@gnu.org>
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Subject: Re: Support for sub-second time in decoded time
Date: Mon, 29 Jul 2019 17:23:51 +0300
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To: Lars Ingebrigtsen <larsi@gnus.org>
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In-reply-to: <m3ef29xjcd.fsf@gnus.org> (message from Lars Ingebrigtsen on Mon, 
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> From: Lars Ingebrigtsen <larsi@gnus.org>
> Date: Mon, 29 Jul 2019 11:48:02 +0200
> 
> `current-time' returns its data as (HIGH LOW USEC PSEC), but now that we
> have bignum support, perhaps we don't need to do it this way.  What
> about just having a field in decoded times that's the fraction of a
> second?

That'd be backward-incompatible, no?