Speculation eagerness
How eager the winning speculation rule is, from conservative to immediate.
At a glance the headline numbers for Speculation eagerness
How eager the winning speculation rule is, from conservative to immediate.
0.6% of sites speculate on hover. 31.5% wait for the press.
Speculation eagerness who uses what, and how fast each group loads
Little daylight between the groups: every variant sits near 37ms median INP. computed
Passing INP per speculation eagerness which group passes the INP most often
No variant stands out: pass rates sit between 98% and 100%. computed
Why this matters for the Core Web Vitals, and where to start fixing it
Eagerness is the trigger: when speculation starts. Conservative waits for the press, the moment between pointer-down and the completed click. Moderate starts on hover. Eager and immediate speculate before any signal, trading wasted loads for a longer head start.
Conservative is close to free: it only speculates on links the visitor is touching, and the press-to-click gap is head start nobody misses. Turn eagerness up only where the next click is predictable, like a paginated flow or a checkout funnel.
How does this affect the Core Web Vitals?
The choice barely moves the INP: 100% pass at best, 98% at worst. This signal does not separate passing sites from failing ones.
The split is bigger on CLS. With Eager, 96% of sites pass it. With Conservative, 78% do.
Chrome field data from 94,910 sites, representing millions of real page loads. How we measured.