How CDN detection works in webpgatest

Question

I did some performance optimization (and I test it with webpagetest.org) but I still have problem with CDN detection. It looks like on screen:

All requests (except first which is http request for html) with red X icon in last column are:

for assets (css, js, images or fonts)
from same domain (different than main application domain)

What should I do to have assets detected as CDN on this test???

score 1 · Accepted Answer · answered Jun 10 '16 at 12:02

1

WebPageTest just uses a list of the most common CDN providers and then parse the assets request header :

CDN_PROVIDER_HEADER cdnHeaderList[] = {
    {"server", "cloudflare", _T("Cloudflare")},

to check (in this case) if there is a server key containing cloudflare.

answered Jun 10 '16 at 12:02

Ivan Gabriele

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It check also if the CNAME of a domain match the DNS of a known CDN – mems Oct 03 '17 at 13:56

score 0 · Answer 2 · answered Mar 31 '16 at 18:48

Are the assets actually hosted on a CDN?

If it's one of the common CDNs that WebPageTest will automatically detect it.

If it's one of the less common ones you may have to update the code and issue a pull request - there are plenty of examples of what needs changing in the closed PRs.

How CDN detection works in webpgatest

2 Answers2