[wp-trac] [WordPress Trac] #44532: Extreme memory leak related to wp_is_stream in wp-includes/functions.php in WordPress 4.9.7

[WordPress Trac]

#44532: Extreme memory leak related to wp_is_stream in wp-includes/functions.php in
WordPress 4.9.7
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 Reporter:  timbowesohft                 |       Owner:  (none)
     Type:  defect (bug)                 |      Status:  new
 Priority:  high                         |   Milestone:  4.9.8
Component:  Media                        |     Version:  4.9.7
 Severity:  major                        |  Resolution:
 Keywords:  has-patch reporter-feedback  |     Focuses:
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Comment (by tristanleboss):

 If the problem comes from the repeated call to `stream_get_wrappers`, why
 don't we cache the output of this function in a function static variable?
 I mean it's not supposed to change during the same request.

 {{{#!php
 <?php
 function test()
 {
  static $stream_get_wrappers = null;

  if( is_null($stream_get_wrappers) )
  {
   $stream_get_wrappers = stream_get_wrappers();
  }
 }
 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/44532#comment:42>
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