This repo tries to give an overview over the landscape of the the different dbus implementations that exists in the rust ecosystem.
- https://github.com/KillingSpark/rustbus
- https://github.com/diwic/dbus-rs/ (bindings to C library)
- https://github.com/diwic/dbus-rs/tree/master/dbus-native
- https://github.com/dbus2/zbus/
- https://github.com/Arnavion/dbus-pure
- https://github.com/srwalter/dbus-bytestream
- https://github.com/LinkTed/dbus-message-parser
- https://github.com/cmaves/async-rustbus
Note that I am the author of rustbus, but of course I am trying to be as objective as possible here.
Some benchmarks exist. I plan to add equivalent ones for the missing libs, and more kinds of benchmarks.
- MarshalMix: Build a signal message with mixed params and marshal it
- MarshalBigArray: Build a signal message with a big u64 array and marshal it
- MarshalStrArray: Build a signal message with a big String array and marshal it
- Marshal + Send: Connect to the sessionbus, build a signal and send it to the bus
The dbus-message-parser does not provide any means of sending messages, so this benchmark is omitted.
I am running this on a Ryzen 3800X (/proc/cpuinfo says: AMD Ryzen 7 3800X). Your values might vary a bit.
I used rustc 1.65.0 (897e37553 2022-11-02) to run these benchmarks.
To replicate these results just run: cargo bench. That will run all benchmarks.
| Library | MarshalMixed | MarshalStrArray | MarshalBigArray | Marshal + Send |
|---|---|---|---|---|
| rustbus | 3.4257 µs | 98.394 µs | 2.1689 µs | 132.86 µs |
| dbus-rs | 168.82 µs | 1.3286 ms | 377.54 µs | 282.87 µs |
| dbus-native | 3.3086 µs | 826.04 µs | 67.291 µs | 87.377 µs |
| dbus-bytestream | 14.002 µs | 1.1528 ms | 150.70 µs | 112.88 µs |
| dbus-message-parser | 35.968 µs | 4.6027 ms | 700.71 µs | NaN |
| dbus-pure | 14.657 µs | 226.58 µs | 23.864 µs | 90.029 µs |
| zvariant | 9.1030 µs | 202.62 µs | 47.606 µs | NaN |
| zvariant-derive | 9.1303 µs | 203.39 µs | 47.352 µs | NaN |
| rustbus-async | 4.5583 µs | 104.72 µs | 2.2329 µs | 168.23 µs |