# Performance

> How fast roaring is: measured numbers, what profiling found, and its benchmark history.

[magmalake](https://magmalake.dev/) [roaring](https://magmalake.dev/s/roaring)

###  Primitives

| Operation | magmalake | Reference |
| --- | --- | --- |
| Roaring bitmap, 10M random values add / serialize / deserialize | 1.30 s / 22.2 ms / 60.3 ms | the add figure was published as 5–11 s until the RNG was moved out of the timed loop |

scroll the table sideways →

Apple M4 — ten cores, four of them performance — macOS, stable Mojo 1.0.0, with nothing else building on the machine. Measured on 5 September 2026; the Iceberg rows on 15 September, the boundary rows on 19 September. [How these were measured](https://magmalake.dev/performance#method).

Every merge also runs its benchmarks on a GitHub runner: [the benchmark history](https://magmalake.github.io/roaring.mojo/benchmarks/). Read it for trends; a shared runner is slower and noisier than the table.

[A magmalake project](https://magmalake.dev/)

Apache 2.0 · © 2026 Marius Seritan