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Umami Script Performance

Umami script benchmark: transfer size, decoded weight, and Slow 4G load overhead — recorded on AnalyticsVS fixtures so you can compare before installing.

Updated

Umami Script Performance

2026-10-26 · Desktop (Chromium) · Slow 4G (Simulated) · Avg of 7 runs

Recorded by AnalyticsVS

Load time

Without analytics182 ms
With analytics427 ms

+245 ms

Loading method
Defer · non-blocking

This script downloads in the background and runs after the HTML is parsed, so the browser can draw the page’s first visible content without waiting on it.

Script filesize
3.4 KiB transfer4.7 KiB decoded

Transfer is the compressed download size, and decoded is what the browser parses afterward.

What this means for your site

On our empty test page, the load event finished +245 ms later with the tag installed. On a real site, page load is likely to take at least that long — but usually not the full +245 ms stacked on top of your other assets, because much of the work overlaps parallel downloads.

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