Charts
Pulls the most recent measurement of every site (excluding starter projects). Tooltips are only shown on green (well scoring) data points.
Page Weight vs LCP 15 sites
JavaScript Weight vs LCP 15 sites
TTFB vs LCP 15 sites
Web Font Weight vs CLS 15 sites
Third Party vs Performance 15 sites
Usually things like analytics, embeds, fonts, tag managers, ads weighted against Lighthouse’s Performance score.
DOM Elements vs Performance 15 sites
DOM element count against Lighthouse’s Performance score. A big document is paid for in style and layout work on every frame.
JavaScript Weight by Site Generator 10 sites
One row per generator, one dot per site, ordered by median.
Across 1 generators with at least five sites each: twenty more were detected too rarely in this data set.
Client Rendering by Generator 14 sites
Sites that painted nothing with scripts disabled, by the tool their page reports building it. One row per generator: a dot for how many of its sites were judged, a dot for how many came up blank, and a line joining them — so the length of the row is the size of the sample the finding came out of.
2 empty pre-JavaScript blank pages from 14 measured sites.
The other 2 generators flagged nothing across 2 judged sites between them — mostly on samples of a handful of sites each.
TTFB by Host 10 sites
Lab vs Field LCP 11 sites
One row per site: a dot for what our throttled lab run measured, a dot for what real users actually saw (Chrome’s field p75) and a line joining them.
The lab is slower than reality on 11 of these and faster on 0.