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by meowface 4269 days ago
A modern web browser will not block page loading when making a request for an image, though. I don't think blocking ads will necessarily improve perceptible page load time, though obviously it will reduce network traffic.

This does not apply for ad code that's implemented as <script src="..."></script>, which will indeed block page loading.
1 comments
burnte 4269 days ago
Try it, the change can be dramatic. Ads have a lot of JS these days.
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meowface 4269 days ago
>Ads have a lot of JS these days.

A lot of the ad JS I see is in the form of inline script tags, which generally should not block anything (the JS usually asynchronously constructs another script tag, which shouldn't impact performance).

>Try it, the change can be dramatic.

I've been using AdBlock Plus, and now uBlock, for at least 8 years. So I'm definitely not arguing against it.

It's just that in theory, an ad tracker (like a 1 pixel image) does not necessarily have to impact performance. Also note that some ad blockers add performance overhead themselves.

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gsnedders 4269 days ago
>A lot of the ad JS I see is in the form of inline script tags, which generally should not block anything (the JS usually asynchronously constructs another script tag, which shouldn't impact performance).

Well, it does impact performance, even if it's async. The pipe is only a finite width (especially on mobile).

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