Crates / deno_core
Rust crate · real downloads · data Oct 27, 2026
deno_core downloads, and should you depend on it?
A modern JavaScript/TypeScript runtime built with V8, Rust, and Tokio crates.io · docs.rs · repository
Established and gaining.
deno_core: 200 crates depend on it; downloads jump on release days (1.4x 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 paragraphdeno_core got 2,494,133 crates.io downloads from Jul 30, 2026 to Oct 26, 2026. 17% of them landed within 2 days of one of its 4 releases. On the other 81 quiet days it got a median of 24,123 a day, about 168,861 a week. Capping release days at that baseline leaves 2,255,444 release-adjusted downloads for the window.
What this means if you're choosing a dependency
- Used, not everywhere. 200 crates depend on it. Look at how fast its issues get answered before you lean on it.
- Actively released. 0.413.0 shipped 6 days ago (Oct 21, 2026).
- Still pre-1.0 (0.413.0). Under Cargo's semver rules a 0.x minor bump may break you, so pin the minor version (
deno_core = "0.413") and read the changelog on upgrades. - Fit check: license MIT, edition 2024 (from the latest version's manifest).
- Compare it by the baseline, not the raw count. 17% of its 2,494,133 downloads in the window landed within 2 days of a release; the steady number is 24,123 a day.
Its place in the dependency graph
deno_core builds on
Tracked crates its latest version (0.413.0) depends on.
What the chart says
- Weekend quiet days ran at 32% of weekday quiet days (9,982 vs 31,137). A dip that deep is the signature of work-week CI pipelines and developers building on weekdays.
- Biggest day: 143,084 on Oct 22, 2026, inside a release window.
Every number
| All-time downloads | 9,317,219 (outside the crates.io top 1,000 by all-time downloads) |
| Downloads in the window | 2,494,133 (Jul 30, 2026 to Oct 26, 2026, 89 days) |
| Within 2 days of a release | 411,932 (16.5%) |
| Quiet-day median (baseline) | 24,123 a day; weekdays 31,137, weekends 9,982 |
| Release-adjusted downloads | 2,255,444 (release-window days capped at the baseline) |
| Baseline rank | #1090 of the 1243 crates we track |
| Quiet-day trend | +82% raw, +32% against the median tracked crate (+39%) |
| Releases in the window | 4 |
| Versions published, ever | 401 |
| Latest version | 0.413.0, published Oct 21, 2026 (license MIT, edition 2024) |
| First published | Sep 13, 2019 |
| Reverse dependencies | 200 |
Releases in the window
Each one opens a 2-day release window on the chart.
| Version | Published | Downloads that version got (lifetime) |
|---|---|---|
| 0.413.0 | Oct 21, 2026 | 2,195 |
| 0.412.0 | Sep 16, 2026 | 45,844 |
| 0.411.0 | Aug 27, 2026 | 53,188 |
| 0.410.0 | Aug 6, 2026 | 45,322 |
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 deno_core 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.
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Categories
Sources
- Daily downloads: crates.io API, /crates/deno_core/downloads (last 90 days, all versions), fetched Oct 27, 2026.
- Versions and publish times: crates.io API, /crates/deno_core/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: 24,019 a day. Few direct dependents and losing ground.opentelemetry-jaegerRust crate. Jaeger exporter for OpenTelemetry. Real use: 24K downloads a day on quiet days; 50 crates depend on it.Read it next →Also worth your time
Art: Nicholas Roerich, Nag Lake (1925). Public domain, via Wikimedia Commons.
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