[wp-trac] [WordPress Trac] #64066: Speculative Loading: Change default eagerness from conservative to moderate when caching is detected

[WordPress Trac]

#64066: Speculative Loading: Change default eagerness from conservative to moderate
when caching is detected
-------------------------------------+-------------------------------------
 Reporter:  westonruter              |       Owner:  (none)
     Type:  enhancement              |      Status:  new
 Priority:  normal                   |   Milestone:  7.0
Component:  General                  |     Version:  6.8
 Severity:  normal                   |  Resolution:
 Keywords:  2nd-opinion has-patch    |     Focuses:  performance,
  needs-unit-tests                   |  sustainability
-------------------------------------+-------------------------------------

Comment (by westonruter):

 See [https://wordpress.slack.com/archives/C02RQBWTW/p1768405145663469
 discussion] in core dev chat.

 This was also discussed in the bugscrub today.

 The feedback I got from @jorbin and @desrosj was:

 1. There needs to be clear communication to hosting providers and
 documentation in the field guide.
 2. Data needs to be gathered on what the expected impact there will be on
 LCP as well as on the increase in page loads (potentially for wasted
 speculations).

 A couple questions for @gilbertococchi (which I also left
 [https://wordpress.slack.com/archives/C02KGN5K076/p1768928476246479 in
 Slack]):

 1. I know you have data on LCP passing rates for sites with conservative
 prefetch versus moderate prefetch. What is the latest relative improvement
 you've seen? Granted, it would be better to look at a set of sites all on
 conservative and then only switch to moderate after a month to see what
 their respective passing rates are.
 2. Also, is there any Chrome data for what is expected for the rate of
 wasted/unused speculations? The only way I'm aware of to measure this
 otherwise would be to look at a site that has very stable monthly traffic,
 and then flip from conservative to moderate after a month, and then to
 obtain the difference in the server hits in the access logs. (Although
 this also may not be reliable, if there is a random bot slamming a site
 one month but not the next.)

-- 
Ticket URL: <https://core.trac.wordpress.org/ticket/64066#comment:17>
WordPress Trac <https://core.trac.wordpress.org/>
WordPress publishing platform