3rd-party size · Size from others
Third-party size: compressed bytes per visit from other domains.
3rd-party size verdict
v1.2.1 vs v1.2.0 · / · mobileUnchanged
Size from others didn’t change. A change only counts when it is at least 5% and at least 20 kB. Here that means 20 kB, so this one doesn’t.
Now · v1.2.1
304 kB
Visits measured
164
on mobile, enough for a verdict
Moved in the same release
The rest of third-party cost. A place to look, not a cause.
Top third-party domains
Ranked by how much they download across visits · Mobile
| Domain | Visits | Size p75 | Blocking p75 |
|---|---|---|---|
| googletagmanager.com | 337 · 92% | 118 kB | 64ms |
| facebook.net | 238 · 65% | 92 kB | 38ms |
| gstatic.com | 318 · 87% | 48 kB | — |
| google-analytics.com | 329 · 90% | 31 kB | — |
“New” means the previous release never reported it. Only domains are collected, never full addresses, and your own subdomains count as yours. A dash means none seen. Browsers only share a file’s size when its server allows it (the Timing-Allow-Origin header). Google, Facebook and most public CDNs do, but some chat and ad vendors don’t, so sizes are a lower bound.