54ef99a365
## Summary `cargo test` has entails both running standard Rust tests and doctests. It turns out that the doctest discovery is fairly slow, and it's a cost you pay even for crates that don't include any doctests. This PR disables doctests with `doctest = false` for crates that lack any doctests. For the collection of crates below, this speeds up test execution by >4x. E.g., before this PR: ``` Benchmark 1: cargo test -p codex-utils-absolute-path -p codex-utils-cache -p codex-utils-cli -p codex-utils-home-dir -p codex-utils-output-truncation -p codex-utils-path -p codex-utils-string -p codex-utils-template -p codex-utils-elapsed -p codex-utils-json-to-toml Time (mean ± σ): 1.849 s ± 4.455 s [User: 0.752 s, System: 1.367 s] Range (min … max): 0.418 s … 14.529 s 10 runs ``` And after: ``` Benchmark 1: cargo test -p codex-utils-absolute-path -p codex-utils-cache -p codex-utils-cli -p codex-utils-home-dir -p codex-utils-output-truncation -p codex-utils-path -p codex-utils-string -p codex-utils-template -p codex-utils-elapsed -p codex-utils-json-to-toml Time (mean ± σ): 428.6 ms ± 6.9 ms [User: 187.7 ms, System: 219.7 ms] Range (min … max): 418.0 ms … 436.8 ms 10 runs ``` For a single crate, with >2x speedup, before: ``` Benchmark 1: cargo test -p codex-utils-string Time (mean ± σ): 491.1 ms ± 9.0 ms [User: 229.8 ms, System: 234.9 ms] Range (min … max): 480.9 ms … 512.0 ms 10 runs ``` And after: ``` Benchmark 1: cargo test -p codex-utils-string Time (mean ± σ): 213.9 ms ± 4.3 ms [User: 112.8 ms, System: 84.0 ms] Range (min … max): 206.8 ms … 221.0 ms 13 runs ``` Co-authored-by: Codex <noreply@openai.com>
codex-stdio-to-uds
Traditionally, there are two transport mechanisms for an MCP server: stdio and HTTP.
This crate helps enable a third, which is UNIX domain socket, because it has the advantages that:
- The UDS can be attached to long-running process, like an HTTP server.
- The UDS can leverage UNIX file permissions to restrict access.
To that end, this crate provides an adapter between a UDS and stdio. The idea is that someone could start an MCP server that communicates over /tmp/mcp.sock. Then the user could specify this on the fly like so:
codex --config mcp_servers.example={command="codex-stdio-to-uds",args=["/tmp/mcp.sock"]}
Unfortunately, the Rust standard library does not provide support for UNIX domain sockets on Windows today even though support was added in October 2018 in Windows 10:
https://github.com/rust-lang/rust/issues/56533
As a workaround, this crate uses codex-uds, which provides a cross-platform async UDS API backed by https://crates.io/crates/uds_windows on Windows.