Crates / Compare / mio vs tokio-test
Rust crates side by side · data Oct 24, 2026
mio vs tokio-test
Short answerBy steady daily use, mio is bigger: 3,332,252 real downloads a day against 234,527 for tokio-test (14.2x). 624 crates depend on mio and 4,239 on tokio-test. mio last shipped 21 days ago, tokio-test 29 days ago.
mio
EstablishedEstablished and steady.
624 crates depend on it; downloads don't spike on releases.
Lightweight non-blocking I/O.
tokio-test
Widely usedWidely used and steady.
4,239 crates depend on it; downloads don't spike on releases.
Testing utilities for Tokio- and futures-based code
miotokio-test · 100% = that crate's normal quiet day, so a spike to 300% is triple its usual traffic
Every number, side by side
| Same window, same method | mio | tokio-test |
|---|---|---|
| Real downloads a day | 3,332,252 | 234,527 |
| Crates that depend on it | 624 | 4,239 |
| Last release | 1.2.4, 21 days ago | 0.4.6, 29 days ago |
| Trend vs the field | -6% | -1% |
| Release-window share | 4.3% | 2.3% |
| Downloads in the window | 288,704,081 | 20,209,281 |
| All-time downloads | 1,170,982,578 | 103,934,003 |
| Versions published | 81 | 17 |
| License | MIT | MIT |
| MSRV | 1.71 | 1.71 |
| First published | Nov 11, 2014 | Feb 21, 2019 |
Which to pick
- Downloads tell you what is common, not what fits. Each crate's own description above says what it is for; when the jobs differ, pick by the job.
- When both fit, prefer the one more crates depend on (tokio-test, 4,239 dependents): more eyes, more answered questions, and you may already have it in your tree.
- Check the release dates against your own pace: mio 21 days ago, tokio-test 29 days ago.
Also in this space
Method
Real downloads = the median day with no release that day or the day before, from the crates.io API (Jul 27, 2026 to Oct 23, 2026). Raw crates.io counts include CI and bots and run high (why); the method is from our 90-day study.
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