Crates / Category
Rust crates · category · data Oct 24, 2026
Memory management crates by real downloads
crates.io describes this category as: “Crates to help with allocation, memory mapping, garbage collection, reference counting, or interfaces to foreign memory managers.” Below are the 13 crates in it among the 300 most-downloaded crates, ranked by real downloads (quiet-day baseline) instead of raw count.
Short answerBy steady daily use, once_cell leads Memory management with 3,785,180 real downloads a day (widely used and steady). 3 of the 13 have 1,000+ dependents; 1 have shipped nothing in 2+ years. Release spikes barely matter here: the median crate got 2.5% of its downloads within 2 days of a release.
13 crates
| Compare | ||||||
|---|---|---|---|---|---|---|
| once_cellWidely used | 3,785,180 | 8,656 | 7mo | -1% | 1.4B | |
| slabEstablished | 3,013,568 | 619 | 9mo | -2% | 1B | |
| yokeEstablished | 2,599,767 | 104 | 2d | -3% | 696M | |
| zerovec-derivePulled in | 2,561,390 | 6 | 2d | +6% | 678M | |
| zerovecPulled in | 2,516,803 | 60 | 2d | +5% | 684M | |
| lazy_staticFoundational | 2,449,997 | 10,953 | 23d | +4% | 1.1B | |
| stable_deref_traitEstablished | 2,440,590 | 110 | 12mo | +2% | 764M | |
| yoke-derivePulled in | 2,432,865 | 14 | 24d | +6% | 687M | |
| zeroizeWidely used | 2,397,082 | 5,204 | 18d | +0% | 802M | |
| zerofrom-derivePulled in | 2,353,727 | 3 | 39d | +6% | 662M | |
| crossbeam-epochEstablished | 2,073,178 | 114 | 49d | +3% | 753M | |
| bumpaloEstablished | 1,968,716 | 546 | 5mo | -1% | 667M | |
| sharded-slabPulled in | 1,733,301 | 32 | 3.1y | +0% | 621M |
Click a column to sort; press + to add a crate to a comparison. Real / day = median downloads on days with no release that day or the day before. Each crate's page shows its verdict and the 4 rules behind it. Why this method · this category on crates.io