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Michael Bolin
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I started looking at https://nexte.st/ because I was interested in a test harness that lets a test dynamically declare itself "skipped," which would be a nice alternative to this pattern: https://github.com/openai/codex/blob/4c46490e53076e807fd2068aa68c5a0e636d8b5f/codex-rs/core/tests/suite/cli_stream.rs#L22-L27 ChatGPT pointed me at https://nexte.st/, which also claims to be "up to 3x as fast as cargo test." Locally, in `codex-rs`, I see - `cargo nextest run` finishes in 19s - `cargo test` finishes in 37s Though looking at CI, the wins are quite as big, presumably because my laptop has more cores than our GitHub runners (which is a separate issue...). Comparing the [CI jobs from this PR](https://github.com/openai/codex/actions/runs/17561325162/job/49878216246?pr=3323) with that of a [recent open PR](https://github.com/openai/codex/actions/runs/17561066581/job/49877342753?pr=3321): | | `cargo test` | `cargo nextest` | | ----------------------------------------------- | ------------ | --------------- | | `macos-14 - aarch64-apple-darwin` | 2m16s | 1m51s | | `macos-14 - aarch64-apple-darwin` | 5m04s | 3m44s | | `ubuntu-24.04 - x86_64-unknown-linux-musl` | 2m02s | 1m56s | | `ubuntu-24.04-arm - aarch64-unknown-linux-musl` | 2m01s | 1m35s | | `windows-latest - x86_64-pc-windows-msvc` | 3m07s | 2m53s | | `windows-11-arm - aarch64-pc-windows-msvc` | 3m10s | 2m45s | I thought that, to start, we would only make this change in CI before declaring it the "official" way for the team to run the test suite. Though unfortunately, I do not believe that `cargo nextest` _actually_ supports a dynamic skip feature, so I guess I'll have to keep looking? Some related discussions: - https://internals.rust-lang.org/t/pre-rfc-skippable-tests/14611 - https://internals.rust-lang.org/t/skippable-tests/21260
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