[tz] [PROPOSED] * tz-link.html (Precision timekeeping): Mention Huygens.

[Paul Eggert]

---
 tz-link.html | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/tz-link.html b/tz-link.html
index 548fbba..7ed1efd 100644
--- a/tz-link.html
+++ b/tz-link.html
@@ -813,11 +813,15 @@ title="Network Time Protocol">NTP</abbr>: The Network
 Time Protocol</a> (Internet <abbr>RFC</abbr> 5905)
 discusses how to synchronize clocks of
 Internet hosts.</li>
+<li>The <a href="https://www.usenix.org/system/files/conference/nsdi18/nsdi18-geng.pdf"><font style="font-variant: small-caps">Huygens</font></a>
+family of software algorithms can achieve accuracy to a few tens of
+nanoseconds in scalable server farms without special hardware.</li>
 <li>The <a
 href="https://www.nist.gov/intelligent-systems-division/ieee-1588">Precision
 Time Protocol</a> (<abbr
 title="Institute of Electrical and Electronics Engineers">IEEE</abbr> 1588)
-can achieve submicrosecond clock accuracy on a local area network.</li>
+can achieve submicrosecond clock accuracy on a local area network
+with special-purpose hardware.</li>
 <li><a
 href="https://tools.ietf.org/html/rfc4833">Timezone
 Options for <abbr title="Dynamic Host Configuration Protocol">DHCP</abbr></a>
-- 
2.17.1