FOSDEM event "A journey to performance"

Raphaël Gomès

Type devroom

Using Rust in Mercurial

Starts on day 1 (2021-02-06) at 13:30 (Brussels time, UTC+1) in room Mozilla (duration 00:45)

Matrix room #mozilla:fosdem.org

Mercurial is a Distributed Version Control System mainly written in Python.

While it is often the VCS of choice for monorepos for its great scalability,

certain parts remain slower than they should be.

Over the past two years, an effort to rewrite parts of the Mercurial core in

Rust has seen multiple significant wins in performance, even compared to C

implementations.

We will go over the different obstacles that Raphaël and his colleagues at

Octobus faced during the rewrite of the ubiquitous

Themes covered include:

- Rust and Python interoperability
- Fast (and slow) Rust datastructures
- Fast directory traversal
- Version control internals
- Append-only binary formats
- Mtime caching
- Safe mmap usage in a concurrent context
- Multithreading
- Unix vs MacOS vs Windows issues

=> FOSDEM schedule page