Save-Data Usage - Web Performance Consulting |

According to Shopify 20% of people in India and Brazil (enormous markets!) are requesting that pages send reduced amounts of data down the pipe, via the save-data header.

We should all be respecting this when the user asks for it.

If you're working HTML-first and progressively enhancing then honouring this by not delivering JavaScript bundles and unnecessary assets should be an easy enough matter.

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According to Shopify 20% of people in India and Brazil (enormous markets) are requesting that pages reduce the amount of data they send, via the save-data request header. Great article by @tkadlec!


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How the hell are you getting all these replies on here, Charlie?

Ah, sweet summer child. It's time to send your own Webmention!


Maurice Walshe

Probably something their phone is automatically setting

2019/08/30, 09:54, CET

Ted Stresen-Reuter

Is this header part of a published standard? Seems interesting but wondering just how much, and what, can be jettisoned.

2019/08/30, 10:36, CET

Christian Schaefer

We don't listen to that header on, because anyone can/will set it, but we do check the connection speed via network information API and disable all ads when it is too slow.

2019/08/31, 06:55, CET

Tom Robertshaw

That’s a nice feature. Remember that network speed isn’t an indication of high transfer costs though.

2019/08/31, 07:01, CET