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message-feed: Improve scroll perf by removing scaling on emojis.

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This removes scaling from the emojis by changing the background size to
a lower value and then allowing for the widths and heights of the
emojis to be proportionally smaller.

The transform: scale property would cause many more repaints in Chrome
and other browsers than should have been necessary which would render
messages above and below the feed light grey boxes that would
momentarily flash as blank before filling with content.

Modified by tabbott to use a percentage in the background-size.

Fixes #4660.
This commit is contained in:
Brock Whittaker
2017-05-03 14:37:28 -07:00
committed by Tim Abbott
parent 110f161288
commit ed4866b9f9
3 changed files with 10 additions and 11 deletions
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2
version.py
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@@ -1,2 +1,2 @@
ZULIP_VERSION = "1.5.1+git"
PROVISION_VERSION = '4.23'
PROVISION_VERSION = '4.24'