Crates / ruff
Rust crate · real downloads · data Oct 27, 2026
ruff downloads, and should you depend on it?
An extremely fast Python linter and code formatter crates.io · docs · repository
Few direct dependents and losing ground.
ruff: only 0 crates name it directly; downloads jump on release days (1.9x the baseline).
How this verdict is decided (4 rules)
- Usage: crates.io reverse dependencies (crates that list it as a dependency): 10,000+ = foundational, 1,000+ = widely used, 100+ = established, under 100 = few direct dependents.
- Direction: the median quiet day in the last 30 days of the window against the first 30, read against the median tracked crate (the whole field moved +39% from late summer to October, so a raw trend says nothing). 10%+ ahead of the field = gaining; 10%+ behind = losing ground; otherwise steady. Steady with no release in 2+ years = quiet for years.
- Release spikes: the median release-window day against the quiet-day baseline: under 1.15x = no spike, 1.15x to 1.3x = small bumps, 1.3x or more = jumps on release days.
- Release recency: days since the newest version that was not yanked, from crates.io publish times.
release window (release day + next day)quiet dayquiet-day median · download the 89 days as CSV
The numbers in one paragraphruff got 1,196 crates.io downloads from Jul 30, 2026 to Oct 26, 2026. 44% of them landed within 2 days of one of its 13 releases. On the other 63 quiet days it got a median of 10 a day, about 70 a week. Capping release days at that baseline leaves 931 release-adjusted downloads for the window.
What this means if you're choosing a dependency
- You rarely add this one yourself. Only 0 crates name it directly.
- Actively released. 0.17.3 shipped today (Oct 27, 2026).
- Still pre-1.0 (0.17.3). Under Cargo's semver rules a 0.x minor bump may break you, so pin the minor version (
ruff = "0.17") and read the changelog on upgrades. - Fit check: license MIT, edition 2024, needs Rust 1.97 or newer (from the latest version's manifest).
- Compare it by the baseline, not the raw count. 44% of its 1,196 downloads in the window landed within 2 days of a release; the steady number is 10 a day.
Its place in the dependency graph
ruff builds on
Tracked crates its latest version (0.17.3) depends on.
What the chart says
- Weekend quiet days ran at 95% of weekday quiet days (10 vs 10). That is a shallow weekend dip, typical of always-on mirrors, scheduled jobs and dependency bots.
- Biggest day: 29 on Sep 3, 2026, inside a release window.
Every number
| All-time downloads | 12,501 (outside the crates.io top 1,000 by all-time downloads) |
| Downloads in the window | 1,196 (Jul 30, 2026 to Oct 26, 2026, 89 days) |
| Within 2 days of a release | 525 (43.9%) |
| Quiet-day median (baseline) | 10 a day; weekdays 10, weekends 10 |
| Release-adjusted downloads | 931 (release-window days capped at the baseline) |
| Baseline rank | #1240 of the 1243 crates we track |
| Quiet-day trend | +14% raw, -18% against the median tracked crate (+39%) |
| Releases in the window | 13 |
| Versions published, ever | 21 |
| Latest version | 0.17.3, published Oct 27, 2026 (license MIT, edition 2024, MSRV 1.97) |
| First published | Jan 13, 2023 |
| Reverse dependencies | 0 |
Releases in the window
Each one opens a 2-day release window on the chart. Showing the last 12 of 13.
| Version | Published | Downloads that version got (lifetime) |
|---|---|---|
| 0.17.2 | Oct 22, 2026 | 71 |
| 0.17.1 | Oct 15, 2026 | 95 |
| 0.17.0 | Oct 9, 2026 | 86 |
| 0.16.10 | Oct 1, 2026 | 78 |
| 0.16.9 | Sep 24, 2026 | 81 |
| 0.16.8 | Sep 16, 2026 | 78 |
| 0.16.7 | Sep 10, 2026 | 71 |
| 0.16.6 | Sep 3, 2026 | 84 |
| 0.16.5 | Aug 27, 2026 | 82 |
| 0.16.4 | Aug 20, 2026 | 76 |
| 0.16.3 | Aug 13, 2026 | 73 |
| 0.16.2 | Aug 7, 2026 | 89 |
How we compute this
crates.io counts every download, including CI runners, mirrors and bots that fetch each new version, so raw counts run high (why, in The Manual). We split the last 89 days into release windows (the day a version of ruff was published, plus the next day) and quiet days, and use the median quiet day as the baseline: an upper bound on steady use, never a head count. The method and data come from our study of 90 days of crates.io data from 69 crates, featured in This Week in Rust #674; check any crate live with the real-downloads checker.
Badge for your README
Maintainers can show the baseline in a README. It is optional, updates when we refresh the data, and links back here. Preview, then copy:
README, light
README, dark
Publishing a crate of your own? How to publish a Rust crate to crates.io, step by step.
Categories
Sources
- Daily downloads: crates.io API, /crates/ruff/downloads (last 90 days, all versions), fetched Oct 27, 2026.
- Versions and publish times: crates.io API, /crates/ruff/versions, same fetch.
- Reverse dependencies: crates.io reverse dependencies, same fetch. Dependency edges between tracked crates: each crate's default version, crates.io API.
- Fetched politely (one request every 2 seconds, identified User-Agent) per the crates.io data access policy. Data is crates.io's; the release-window split, baseline and verdict rules are ours, CC BY 4.0.
Up next
Next by real downloads: The next crate down the real-downloads ranking: 8 a day. Few direct dependents and losing ground.newrelicRust crate. Idiomatic Rust bindings to the New Relic C SDK. Note: versions 0.1.0 onwards of this crate are completely incompatible with previous versions as they move...Read it next →Also worth your time
Art: Nicholas Roerich, Nag Lake (1925). Public domain, via Wikimedia Commons.
.jpg){kind=link}