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© 2019 Delete
@POLLY_P #TECHSEOSUMMAT
Page Speed optimisation:
no more fake CDNs!
POLLY POSPELOVA // DELETE
@POLLY_P #TECHSEOSUMMAT
1. What is a CDN.
2. How a CDN helps SEO.
3. How SEOs use CDNs.
4. How to stop relying on fake CDNs.
What We’ll Cover.
@POLLY_P #TECHSEOSUMMAT
As SEOs, we all want
to achieve better
ranking in the SERPs.
@POLLY_P #TECHSEOSUMMAT
• Relevant, useful and original content
• Trustworthiness
• Backlink factors
• Brand Signals
• Low page loading time
• Site speed
@POLLY_P #TECHSEOSUMMAT
What is a CDN?
© Copyright 2019 Delete
@POLLY_P #TECHSEOSUMMAT
@POLLY_P #TECHSEOSUMMAT
How does a CDN
help SEO?
@POLLY_P #TECHSEOSUMMAT
1. Speed is a
ranking factor.
@POLLY_P #TECHSEOSUMMAT
2. Speed effects
bounce rate and
conversions.
@POLLY_P #TECHSEOSUMMAT
3. Speed effects
revenue.
@POLLY_P #TECHSEOSUMMAT
How SEOs use CDNs.
@POLLY_P #TECHSEOSUMMAT
Fake CDNs.
© Copyright 2019 Delete
@POLLY_P #TECHSEOSUMMAT
HTTP/1
© Copyright 2019 Delete
@POLLY_P #TECHSEOSUMMAT
c
© Copyright 2019 Delete
@POLLY_P #TECHSEOSUMMAT
140 / 6 ≈ 23
© Copyright 2019 Delete
@POLLY_P #TECHSEOSUMMAT
HTTP/1 Connections Limit
Browser Version Connections Per Hostname Max Connections
Chrome 34/32 6 10
IE9 6 35
IE10 8 17
IE11 13 17
Firefox 27/26 6 17
Safari 7.0.1 6 17
Chrome Mobile 6 16
IE Mobile 9 6 60
Source: http://www.browserscope.org/?category=network&v=top
@POLLY_P #TECHSEOSUMMAT
Fake CDNs example:
https://old.deleteagency.com
© Copyright 2019 Delete
@POLLY_P #TECHSEOSUMMAT
© Copyright 2019 Delete
@POLLY_P #TECHSEOSUMMAT
© Copyright 2019 Delete
@POLLY_P #TECHSEOSUMMAT
@POLLY_P #TECHSEOSUMMAT
Render-blocking
resources.
BRIGHTONSEO
© Copyright 2019 Delete
@POLLY_P #TECHSEOSUMMAT
CDN can drastically increase the speed of
your website, but it doesn’t solve render-
blocking resources issues.
If you have a lot of render-blocking
resources, you might still experience
delays.
© Copyright 2019 Delete
@POLLY_P #TECHSEOSUMMAT
c
© Copyright 2019 Delete
@POLLY_P #TECHSEOSUMMAT
Abrowser doesn’tstart rendering apageuntilitloads
andparsesallresources.
© Copyright 2019 Delete
@POLLY_P #TECHSEOSUMMAT
We only take the necessary resources (JS, CSS) for a page
and then inline them into HTML markup, in a <head> tag.
c
© Copyright 2019 Delete
@POLLY_P #TECHSEOSUMMAT
After theinlinemarkuploads, wethenload allthe
necessaryresourcesin thebackgroundand cachethem.
© Copyright 2019 Delete
@POLLY_P #TECHSEOSUMMAT
We check if the browser already has the
resources cached and we skip inlining.
© Copyright 2019 Delete
@POLLY_P #TECHSEOSUMMAT
The content loads instantly
on the first and all subsequent loads.
@POLLY_P #TECHSEOSUMMAT
HTTP/2.
© Copyright 2019 Delete
@POLLY_P #TECHSEOSUMMAT
HTTP/1 HTTP/2
© Copyright 2019 Delete
@POLLY_P #TECHSEOSUMMAT
No more fake CDNs.
@POLLY_P #TECHSEOSUMMAT
1. Stream multiplexing.
2. Explicit stream dependencies.
3. Server Push.
4. HPACK (the silent killer feature).
© Copyright 2019 Delete
@POLLY_P #TECHSEOSUMMAT
Multiplexing is a method by which multiple HTTP requests can
be sent and responses can be received asynchronously via a
single connection. Multiplexing is the heart of HTTP/2 protocol.
Stream multiplexing.
© Copyright 2019 Delete
@POLLY_P #TECHSEOSUMMAT
A browser can assign a priority for a new stream by including
prioritisation information in the HEADERS.
Explicit stream dependencies.
© Copyright 2019 Delete
@POLLY_P #TECHSEOSUMMAT
Server Push enables websites speculatively deliver content to
the web browser before the browser sends a request for it.
Server Push.
© Copyright 2019 Delete
@POLLY_P #TECHSEOSUMMAT
HTTP/2 supports a new dedicated header compression
algorithm, called HPACK.
HPACK.
@POLLY_P #TECHSEOSUMMAT
No more fake CDNs example:
https://www.deleteagency.com
© Copyright 2019 Delete
@POLLY_P #TECHSEOSUMMAT
© Copyright 2019 Delete
@POLLY_P #TECHSEOSUMMAT
© Copyright 2019 Delete
@POLLY_P #TECHSEOSUMMAT
@POLLY_P #TECHSEOSUMMAT
You can't do it
alone!
© Copyright 2019 Delete
@POLLY_P #TECHSEOSUMMAT
Thank you.

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Page speed optimisation: No more fake CDNs!