rolldown
Fast JavaScript/TypeScript bundler in Rust with Rollup-compatible API.
npm says
158,226,605
per week
Every tarball fetch: mirrors, scanners, CI and people.
real installs
high confidence≈ 158M
per week
Mirror spikes and crawlers removed. CI and dependency installs still count, so this is not a head count.
noise under 1% of npm's count, so nearly all of it counts. noise real installs
Why this estimate
With JavaScript on, this lists what the filter found for this package.
Snapshot from the daily build of Nov 6, 2026, last 7 days of npm data. With JavaScript on, this page recomputes it live from the npm API.
How many people use rolldown?
npm counted 158,226,605 downloads of rolldown in the last 7 days. Nobody can count people exactly, npm included: it does not record who downloaded what. After removing mirror spikes and crawlers, about 158M look like real installs. At this scale most of them come from CI, builds and other packages that depend on rolldown, so the number of people behind them is far smaller.
Is rolldown still maintained?
Most likely yes, going by its releases. The latest version, 1.3.0, came out on Nov 5, 2026. The last 12 months saw 28 stable releases, typically 7 days apart, plus 31 pre-releases. It was first published on Jan 1, 2017. npm lists 4 maintainers.
Is rolldown still used?
Downloads with publish spikes removed are up 70% over 3 months and up 7,034% over 11 months. For scale, the median of the 269 packages we track, which lean towards today's most downloaded, is up 157% over 11 months, so this one is ahead of that. Last week, 100% of downloads above the crawler floor were on major version 1, the latest one; the most used single version was 1.2.15, with 18%. Weekdays get 1.22× the downloads of weekends, so there is no clear work-week rhythm. Crawlers account for about 649 downloads a week, roughly 1 per version.
How the estimate works
- Cut the spike every new version gets from mirrors in its first days.
- Subtract the flat floor robots download from every version each week.
- Show what is left as a range, with a confidence level. It still includes CI and dependency installs, so it is not a count of people.