Decision Workspace
r2d2_postgres vs nanopool vs pg_connector
Side-by-side comparison of Rust crates
48
r2d2_postgres
growingv0.18.2
Postgres support for the r2d2 connection pool
51
nanopool
growingv1.2.0
A tiny database connection pooling library for PostgreSQL
45
pg_connector
experimentalv1.0.1
A powerful and easy-to-use PostgreSQL connector for Rust with connection pooling and read/write cluster support.
Core Metrics
| r2d2_postgres | nanopool | pg_connector | |
|---|---|---|---|
| Health Score | 48 | 51 | 45 |
| Total Downloads | 1.2M | 547 | 286 |
| 30d Downloads | 42.7K | 0 | 0 |
| Dependents | 463 | 0 | 0 |
| Releases | 30 | 3 | 2 |
| Last Updated | 518d ago | 144d ago | 65d ago |
| Age | 11y 6m | 11m | 2m |
Health Breakdown
r2d2_postgres
Maintenance
5
Quality
15
Community
12
Popularity
7
Documentation
9
nanopool
Maintenance
12
Quality
18
Community
6
Popularity
3
Documentation
12
pg_connector
Maintenance
10
Quality
17
Community
5
Popularity
3
Documentation
10
Technical Details
| r2d2_postgres | nanopool | pg_connector | |
|---|---|---|---|
| Version | 0.18.2 | 1.2.0 | 1.0.1 |
| Stable (≥1.0) | ✗ No | ✓ Yes | ✓ Yes |
| License | MIT | MIT | MIT OR Apache-2.0 |
| Dependencies | 2 | 5 | 3 |
| Crate Size | 3KB | 17KB | 12KB |
| Features | 0 | 1 | 0 |
| Yanked % | 0.0% | 0.0% | 0.0% |
| Edition | 2018 | 2021 | 2024 |
| MSRV | — | 1.71 | — |
| Owners | 2 | 1 | 1 |
Links
Quick Verdict
- •nanopool leads with a health score of 51/100, but none of the options score above 80.
- •r2d2_postgres has the most downloads (1.2M), suggesting wider adoption.
- •r2d2_postgres is depended on by 463 crates — strongest ecosystem trust.
- •⚠ r2d2_postgres has not been updated in over a year.
- •r2d2_postgres is pre-1.0 — API may change.