[wp-trac] [WordPress Trac] #36335: Next generation: core autoloader proposal

[WordPress Trac]

#36335: Next generation: core autoloader proposal
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 Reporter:  dnaber-de        |       Owner:
     Type:  feature request  |      Status:  new
 Priority:  normal           |   Milestone:  4.7
Component:  General          |     Version:
 Severity:  normal           |  Resolution:
 Keywords:  has-patch        |     Focuses:
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Comment (by TJNowell):

 I believe I've been misinterpreted by both sides regarding performance.
 It's not wether autoloader X or autoloader Y is faster. It's wether
 autoloading vs no autoloading is faster.

 Right now, with no optimisations autoloading slows down WordPress due to
 the greater number of files being loaded. It's a small difference but we
 won't get an autoloader if it slows down core. We need to demonstrate with
 hard facts that an improvement is possible. Right now all we have is
 theoretical, and a number of senior developers have already chimed in with
 that's not good enough.

 I'd also like to raise some questions:

  - I don't understand why we need to rearrange most of core, this sounds
 like a recipe for disaster and failed auto-updates. It screams fragile
  - I don't see why we need to rename our files, the part were we find the
 classes and their filenames is meant to happen at buildtime, it's just a
 PHP array `'class' => 'filename'`, why overcomplicate things?
  - There may be things we don't want to autoload that are always loaded,
 or too critical to let a plugin override
  - Nobody has ruled out the composer autoloader, discussion on wether it
 should be used is premature as the case for an autoloader has not been
 made

 As for benchmarks, install Query Monitor and run a vanilla install with
 and without these changes, and measure 10 common page loads 10 times. That
 should give crude timings. Better yet use a cli tool

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Ticket URL: <https://core.trac.wordpress.org/ticket/36335#comment:218>
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