QNetworkReplyHttpImpl: convert some QDateTime::currentDateTime() to currentDateTimeUtc()

The latter is much faster as it doesn't have to deal with
time zones.

This change is safe, because the QDateTime is only used to
compare against a copy of itself, adjusted by some seconds,
which doen't care which TZ the date-time is in, to get a
time_t, which is much faster done from a UTC time, and
to calculate the seconds to expirationTime, which, from a
quick glance around, seem to be mostly, if not exclusively,
in UTC. secsTo() works across time zones, but the comparison
between UTC date-times is fastest.

Credits to Milian Wolff, from whose QtWS15 talk this advice is
taken.

Change-Id: I22aa5350b29493f01fb503ef5ec68a964ca95cf3
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>

0 files changed, 0 insertions, 0 deletions