[wp-trac] [WordPress Trac] #37958: Improve looping through sites and restoring

[WordPress Trac]

#37958: Improve looping through sites and restoring
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 Reporter:  tfrommen            |       Owner:
     Type:  enhancement         |      Status:  new
 Priority:  normal              |   Milestone:  Awaiting Review
Component:  Networks and Sites  |     Version:
 Severity:  normal              |  Resolution:
 Keywords:                      |     Focuses:  multisite, performance
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Comment (by johnjamesjacoby):

 `WP_Locale_Switcher:: restore_current_locale()` does exactly what
 `restore_site_state()` does.

 If we do end up with a switcher class, I don't think we need a fourth
 layer of API's around globals, objects, and procedures.

 Also, the proposed patch here is kinda doing-it-wrong. Why create a local
 variable to encapsulate the states of a few globals when you can already
 look at the globals directly or avoid them procedurally?

 In the `get_site_state()` function, a new `WP_Site_State` object is
 created with each call, so we'd end up with many copies of those globals
 with different signatures in PHP that will consume an ever increasing
 amount of memory when used multiple times within the same scope.

 I think this is trying to solve a problem that doesn't exist, and
 introduces more complexity than it adds value.

 ---

 Consider also that this patch is not a backwards compatible replacement
 for what's in core, because the `switch_blog` action does not get fired on
 the way out of the iterator anymore, only at the beginning. And currently,
 the switched stack is only really ever 2 items deep, not several, though
 it's certainly possible to do so on your own.

 Not gonna lie, it's gonna be hard to win me over on this one. :)

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Ticket URL: <https://core.trac.wordpress.org/ticket/37958#comment:15>
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