The most expensive part of adding the display time to messages is
calling time.toLocaleDateString() and time.toLocaleTimeString().
Most of the time, this information never gets seen, so we now delay
calculating it until just before the user would see it. This cuts
the time to render a chunk of messages from >1s to ~200ms.
(imported from commit 6167e7a8e1c3b4ca77471fa346292be4ffa67ec8)
This commit does the actual work of formatting recent dates as weekday
names and updating the format when the date is sufficiently far in the
past.
Also, silence a bogus jslint warning.
(imported from commit 503286fbd9c1e33a81cc7d78cf8d08d5e7f78c1a)
This commit just moves time rendering logic to its own file, and does
not make any functionality changes.
(imported from commit d111d03c6abc8d9550fcf65e4f89eab8056d1ed4)
Zev Benjamin
Reid Barton