Service Infrastructure

Most services in the Rust Infrastructure are deployed via rust-central-station. Questions about infrastructure, including current status, should go to the #t-infra Zulip stream.

Our stability guarantees: many of our services rely on publicly-accessible storage and APIs, but not all of these are intended for public consumption. At the moment, only the resources behind are considered stable, meaning that those resources will not change without (at least) prior notice. If you are relying on other parts of the Rust project infrastructure for your own work, please let the infrastructure team know.

Rust Log Analyzer

The Rust Log Analyzer analyzes CI build logs to extract error messages and posts them to the pull request. It is run by TimNN.

Homu / bors

Homu is a bot which manages pull requests. It is often referred to as “bors” due to the name of its bot user account. Approved pull requests are placed in a queue from which tests are run.

Documentation on homu commands can be found here.

Please contact Alex Crichton if something goes wrong with the bot.


rfcbot is a bot (bot user account) which helps manage async decision making on issues and PRs (typically RFCs). Team members can view any pending requests for review on the FCP dashboard.

Documentation on rfcbot commands can be found in the rfcbot repository.


rustbot is a bot (bot user account) to assist with managing issues and PRs to allow users to label and assign without GitHub permissions. See triagebot for more information.


DXR is a cross-referenced source index for Rust, allowing the Rust source tree to be navigated and searched with ease. It is generated by rust-dxr

perf / rust-timer

perf offers information about the performance of rustc over time, and a bot for on-demand benchmarking.

It is split into a data collector and a web frontend + bot. The raw performance data is available here and can be browsed on the perf website.

One-off performance runs can done by addressing the rust-timer bot (bot user account). You can trigger the necessary try-build and queue a perf run by saying

@bors try @rust-timer queue

(Technically, the requirement is that the queue command finishes executing prior to the try build completing successfully.)

See the documentation for further bot commands.

Rust Playground

Rust Playground allows you to experiment with Rust before you install it locally, or in any other case where you might not have the compiler available. The Rust playground can be accessed here.


Crater is a tool to run experiments across the whole Rust ecosystem. Its primary purpose is to detect regressions in the Rust compiler, and it does this by building large number of crates, running their test suites and comparing the results between two versions of the Rust compiler.

Crates comes with a bot to trigger experiments. builds and serves the rustdoc documentation for all crates on Issues may be filed on the repository. See the #docs-rs channel on Discord for discussion or urgent issues.


The state of tools included with Rust are tracked on the toolstate page. When each PR is merged via CI, the status of each tool is recorded in a JSON file and stored in the toolstate repo. For further information, see the toolstate system documentation.

Rustup components history

The rustup components history tracks the status of every rustup component for every platform over time. See the repository for more information.

CI Timing Tracker

The CI Timing Tracker tracks and compares how long CI jobs take over time. It is run by Alex Crichton.

Highfive (retired)

Highfive is a bot (bot user account) which was previously used to welcome newcomers and assigned reviewers. This service has been replaced with rustbot.