inflight
Add callbacks to requests in flight to avoid async duplication
Deprecated on npm. The maintainers' message: “This module is not supported, and leaks memory. Do not use it. Check out lru-cache if you want a good and tested way to coalesce async requests by a key value, which is much more comprehensive and…”
npm says
126,411,794
per week
Every tarball fetch: mirrors, scanners, CI and people.
real installs
high confidence≈ 126M
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 inflight?
npm counted 126,411,794 downloads of inflight 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 126M look like real installs. At this scale most of them come from CI, builds and other packages that depend on inflight, so the number of people behind them is far smaller.
Is inflight still maintained?
No: the latest version is marked deprecated on npm, with the message “This module is not supported, and leaks memory. Do not use it. Check out lru-cache if you want a good and tested way to coalesce async requests by a key value, which is much more comprehensive and…”. The latest version, 1.0.6, came out on Oct 13, 2016. There were no stable releases in the last 12 months. It was first published on May 5, 2014. npm lists 1 maintainer.
Is inflight still used?
Downloads with publish spikes removed are up 30% over 3 months and up 86% 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 behind that. Last week, 100% of downloads above the crawler floor were on major version 1, the latest one; the most used single version was 1.0.6, with 100%. Weekdays get 1.6× the downloads of weekends, which fits people at work, though CI follows the same rhythm. Crawlers account for about 424 downloads a week, roughly 61 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.