Opened 17 months ago
Last modified 14 months ago
#47500 new enhancement
Optimize customizer load time
| Reported by: |
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Owned by: | |
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| Milestone: | Awaiting Review | Priority: | normal |
| Severity: | normal | Version: | |
| Component: | Customize | Keywords: | |
| Focuses: | javascript, performance | Cc: |
Description
Please see some discussion in slack for background and ideas
https://wordpress.slack.com/archives/C0381N237/p1559852377000600
TLDR; More plugins and themes are using the customizer. It's a very good experience when making changes to options that affect the display of the site. As more controls are added the initial page render is taking longer and longer.
Searching for things like "WordPress customizer long load times" results in tickets like
https://wordpress.org/support/topic/customizer-takes-12-seconds-to-load/
In my own tests against a plugin I develop for I've found DOM Ready load times approaching 10 seconds.
In default usage this is not apparent, but as themes and plugins use the customizer it becomes very slow.
Ideally the initial page render should be more complete and then panels, sections, and controls can be added. This will make the page "feel" complete and more responsive.