+1 to Michael’s point. Naming of variables holding seconds/milliseconds is all 
over the place.
So, I would favor using Seconds/WallTime/MonotonicTime classes, since they will 
basically
guarantee that the variable name and/or type will describe the units near 
use-sites and avoid
ambiguity.

Not to belabor Fil’s original argument against std::chrono, but the sheer 
amount of templates
necessary to express something very simple has scared away myself and plenty of 
others
from converting code away from doubles. Not to mention, it will trip up anyone 
reading the
code who hasn’t invested time reading the documentation or doing their own 
conversion.
Some of the errors Fil mentions, such as overflow, are so obfuscated by the 
type gymnastics
that the easy-to-understand class of bugs std::chrono eliminates are replaced 
with more
subtle and harder to fix overflow errors.

Brian

> On May 23, 2016, at 8:04 AM, Michael Catanzaro <mcatanz...@igalia.com> wrote:
> 
> On Mon, 2016-05-23 at 07:27 -0700, Filip Pizło wrote:
>> You guys are making a convincing case for
>> Seconds/WallTime/MonotonicTime!
>> 
>> -Filip
> 
> I will add: the convention "double means seconds" is very much not
> obvious. It's OK when we're careful to consistently use "seconds" in
> function and variable names, but in practice, that's not always or even
> usually the case in WebKit code.
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