[wp-trac] [WordPress Trac] #43160: Reduce wp-admin/update-core.php load time by half

[WordPress Trac]

#43160: Reduce wp-admin/update-core.php load time by half
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 Reporter:  lano1106         |       Owner:
     Type:  enhancement      |      Status:  new
 Priority:  normal           |   Milestone:  Awaiting Review
Component:  Upgrade/Install  |     Version:  4.9.2
 Severity:  normal           |  Resolution:
 Keywords:                   |     Focuses:  administration, performance
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Comment (by lano1106):

 Hi, I have new info concerning my wp-admin/update-core.php slowness issue.
 It is caused by the plugin Ad Inserter Pro (author contacted) who does
 this:

 {{{#!php
 <?php
 add_filter (‘http_headers_useragent’, ‘ai_http_headers_useragent’);

 function ai_http_headers_useragent ($useragent) {

  $useragent = get_bloginfo (‘url’);

  return $useragent;

 }
 }}}

 This appears to disrupt all the other premium plugins when they contact
 their servers to check the license validity. One of the things that they
 do remotely is to authenticate the request by checking the user-agent
 header-field. By messing with it, it disrupts a LOT of stuff.

 http_headers_useragent filter hook appears to be VERY VERY risky hook...

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Ticket URL: <https://core.trac.wordpress.org/ticket/43160#comment:1>
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