[wp-trac] [WordPress Trac] #31789: Themes: allow a pre filter in `wp_prepare_themes_for_js()`

[WordPress Trac]

#31789: Themes: allow a pre filter in `wp_prepare_themes_for_js()`
-------------------------+--------------------------
 Reporter:  mattwiebe    |       Owner:
     Type:  enhancement  |      Status:  new
 Priority:  normal       |   Milestone:  4.2
Component:  Themes       |     Version:  trunk
 Severity:  normal       |  Resolution:
 Keywords:  has-patch    |     Focuses:  performance
-------------------------+--------------------------

Comment (by mattwiebe):

 Just to provide a bit more data, here's a set of `ab` results, just for
 loading `wp-admin/customize.php`

 {{{
 v 4.1.1
               min  mean[+/-sd] median   max
 Connect:      284  299  16.2    293     347
 Processing:  2876 3259 532.5   3093    5031
 Waiting:     1733 2066 530.1   1888    3897
 Total:       3170 3557 544.9   3392    5378

 v 4.2-beta3-31930
               min  mean[+/-sd] median   max
 Connect:      281   304   22.9   302    375
 Processing:  9381 10776 1617.9 10423  16147
 Waiting:     7477  8755 1638.2  8366  14265
 Total:       9663 11080 1620.2 10733  16441
 }}}

 My wp.com sandbox isn't crazy powerful, but that's still really rough.

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Ticket URL: <https://core.trac.wordpress.org/ticket/31789#comment:5>
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