Re: master 4a1f69ebca 2/2: Use (TICKS . HZ) for current-time etc.

[Paul Eggert]

On 4/27/22 09:55, Stefan Monnier wrote:
> Instead of rounding the times to whole seconds, wouldn't it make more
> sense to check that the difference is larger than 1s?

org-file-newer-than-p is intended to work on filesystems like HFS+ that 
store just the seconds part of the last-modified time. Since these 
filesystems take the floor of the system time, taking the floor should 
be the most-accurate way to work around timestamp truncation issues, 
where comparing one timestamp that comes from an HFS+ filesystem to 
another timestamp coming from some other source (which is how 
org-file-newer-than-p is used).

The code won't work as desired on filesystems like FAT where the 
last-modified time has only 2-second resolution. Ideally Emacs Lisp code 
would have access to file timestamp resolution but that's not something 
it has now, so I merely preserved org-file-newer-than-p's assumption 
that taking the floor is good enough.