Where the time goes
166 sites, timed the same way every week. 42 of them are under the rule. This is what the board looks like when you stop reading it one row at a time.
Where the web stands
Every site we time, in quarter-second bins. Green is inside the rule; the outline is the same sites on desktop.
Phone, one bar per 0.25 sDesktop, same binsThe 1.5 s club line
Heavy or slow?
The 39 sites with a lab run. Weight and speed are related, not the same thing — the shaded corners are where they part company.
Third-party requestsunder 20 · 20–99 · 100+In the clubAlmostOver 2.5 s
Heavy but fast
Over 3 MB and in the club anyway. Bytes are not the rule.
Light but slow
Under 1 MB and still over 2.5 s. The bytes were never the problem.
By category
Median phone LCP per category, fastest first. The dashed rule is 1.5 s. 11 sites have no category yet and sit outside this chart.
Bar in the band of the medianThe 1.5 s club line
Phone vs desktop
The same site measured on both. Everything above the diagonal is slower on a phone, which is nearly everything.
Dot in the band of its phone readingSame speed on bothThe 1.5 s club line, both axes
Only fast on a laptop
In the club on desktop, out of it on a phone. Sorted by the size of the gap.
Six months of movement
Weekly p75s since March: the last three weeks against the first three. A trace is a shape, the number beside it is the change.
Getting slower
The six going the other way.
Across all 157 tracked sites the median moved +0.02 s since March, which is to say it did not move at all.
Standouts
One winner per metric. Every "?" says what the metric is in plain words.
2ms
54ms
0.000CLS
1,012requests
1 KB