79

of pages were over 1MB, 53% over 2MB, and 23% over 4MB."

Google Research, Webpagetest.org, sampled 11M global mWeb domains loaded using a globally representative 4G connection, Jan. 2018.

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Related Data

The average time it takes to fully load a mobile landing page has dropped by seven seconds."

January 2018 Google Research

On 70% of the mobile landing pages analyzed, it took >5 seconds for visual content above the fold to display, and >7 seconds to fully load all visual content above and below the fold.

January 2018 Google Research
25

of pages could save more than 250KB and 10% can save more than 1MB that way."

January 2018 Google Research

Even as most traffic is now occurring on 4G instead of 3G, the majority of mobile sites are still slow and bloated with too many elements.

January 2018 Google

As the number of elements — text, titles, images — on a page goes from 400 to 6,000, the probability of conversion drops 95%.

December 2017 Google/SOASTA

As page load time goes from one second to 10 seconds, the probability of a mobile site visitor bouncing increases 123%.

December 2017 Google/SOASTA