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Date: Wed, 4 Jan 2017 18:00:07 +0100
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Subject: Re: [PHP-DEV] Fwd: Monotonic Time
From: mike@php.net (Michael Wallner)

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From: Michael Wallner <mike@php.net>
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Subject: Re: [PHP-DEV] Fwd: Monotonic Time
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On 04/01/17 13:58, Niklas Keller wrote:
> Resending previous mail, because mail distribution was broken...
>=20
> Morning Internals,
>=20
> PHP doesn't currently have a way to access a monotonic time. There's a
> feature request in the bug tracker: bugs [dot] php [dot]
> net/bug.php?id=3D68029
>=20
> A monotonic time is required to measure time intervals correctly, e.g. =
for
> implementing event loops based on stream_select. microtime() is affecte=
d by
> NTP and leap seconds and can therefore not be reliably used for measuri=
ng
> time intervals.
>=20
=2E..
> There's an existing PECL extension named hrtime: php [dot]
> net/manual/en/book.hrtime.php
>=20
> I think we can reuse parts of it to implement a function in core to acc=
ess
> a monotonic time, I don't think we need to merge the extension into cor=
e.
>=20
> What do you think about adding such a function to the PHP core?

+1?

Actually, it seems, that hrtime doesn't let you access the current
value, which is, well, quite a major use case, isn't it?


--=20
Regards,
Mike


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