bkcdn.net: the pages carrying it start almost immediately

A 390 ms median first contact, rank 87 of 88

The median site carrying bkcdn.net made its first outbound contact at 390 ms. Against the 88 companies in this index that ranks 87th where rank 1 is the slowest, so only one company in the whole set sits on pages that start sooner. The quickest single site in this group reached out at 101 ms.

All 50 sites reached a company inside the opening window, before any banner could have been read and answered — a 100% share, and no company of the 88 has a higher one; Osano and magsrv.com also reach 100. The median count of companies reached inside that window is 7, out of 8 contacted in total, and the median number first contacted after it closed is 0, counted per site rather than derived from the two figures above.

So the shape here is: start fast, fetch nearly everything before a visitor could respond, and then stop. That is the whole load profile in one sentence, and it barely varies across the group.

Six sites out of 50 showed a banner at all

Consent software was detected on 6 of the 50 sites, all six of them an IAB TCF framework banner. No other consent tool was found anywhere in this group.

Six out of fifty leaves 44 sites where the crawler found no banner at all, and that is what makes the 100% early-contact figure less surprising than it first reads: on those 44 pages there was nothing for anything to wait for. Early contact and consent tooling are separate measurements, and this group has one without the other.

Eight companies, one tracker

The median site here contacted 8 companies over 37 requests, 1 of them carrying a tracking classification in this index's catalogue. A median of 1 tracker is the commonest figure in this index: 37 other companies report it too and only two of the 88 sit lower, so an ordering says far less here than the value does. Companies contacted and requests are both mid-table — 34 of the 88 sit lower on companies, 29 lower on requests.

A page reaching 8 organisations with only 1 of them recognised as a tracker usually means the same thing: most of what it contacts is not in a public vendor catalogue at all. That is the case here. Seven of the ten most common co-present names in this group are bare hostnames rather than branded vendors.

A single genre, and its own supply chain

Google was present on 38 of the 50 sites (76%), magsrv.com on 38 (76%), pemsrv.com on 27 (54%), Cloudflare on 16 (32%), Cloudflare Analytics on 7 (14%), tsyndicate.com on 7 (14%), xvideos-cdn.com on 6 (12%), tcdwm.com on 6 (12%), agego.com on 6 (12%) and yadro.ru on 5 (10%).

Every named example site in this group is an adult video or image site. xvideos.com contacted 3 companies with 2 inside the window, first contact at 416 ms behind a TCF banner. sxyprn.com is the heaviest at 20 companies with all 20 inside the window, at 234 ms with no banner detected. iporntv.net reached 8 with all 8 inside at 101 ms, the fastest in the group. pornone.com contacted 11 with 6 inside, at 601 ms.

The co-presence list is the reason the group is so uniform. magsrv.com and pemsrv.com are ad-serving hostnames concentrated in this sector, and they appear on 76% and 54% of these sites respectively. A page in this genre is not assembled from the general web's components; it draws on a supply chain of its own, and bkcdn.net is part of it.

What a fast start does not tell you

Reaching a third party at 390 ms is a timing fact and nothing more. It does not establish what was sent, whether anything identified the visitor, or which of the 8 companies arrived first — this index counts early contact per site as a number of companies and never as a list of names, so no arrival can be attributed to bkcdn.net specifically.

What the 50 sites do show cleanly is a category effect. A group this small and this consistent is not a random slice of the web; it is one sector's default stack, measured 50 times. The definition of the window these timings are measured against is at /consent-gap, and MurmStack performs the same measurement on any page you have open.

Seen on the same pages

Companies most often contacted by the same sites. Co-presence only — the crawl records what arrived, not who called whom.

• GoogleTogether on 38 of these sites
• magsrv.comTogether on 38 of these sites
• CloudflareTogether on 16 of these sites
• Cloudflare AnalyticsTogether on 7 of these sites
• yadro.ruTogether on 5 of these sites