[wp-trac] [WordPress Trac] #32197: Twemoji script and editor expansion combo making editor ridiculously slow in some circumstances

[WordPress Trac]

#32197: Twemoji script and editor expansion combo making editor ridiculously slow
in some circumstances
--------------------------+--------------------
 Reporter:  Otto42        |       Owner:
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  4.2.2
Component:  TinyMCE       |     Version:  4.1
 Severity:  major         |  Resolution:
 Keywords:                |     Focuses:
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Comment (by Otto42):

 Definitely a Chrome thing, somehow.

 Test in Chrome console. "re" is already defined as that big twemoji
 regexp.

 {{{
 console.time('a'); for (i = 1; i <= 10000; i++)
 re.test('1111111111111111111'); console.timeEnd('a');
 a: 14.108ms

 console.time('a'); for (i = 1; i <= 10000; i++)
 re.test('111111111111111111“'); console.timeEnd('a');
 a: 2762.734ms
 }}}

 Not sure why, but it really hates those special characters.

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Ticket URL: <https://core.trac.wordpress.org/ticket/32197#comment:12>
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