From b75eb896d7063a68bbcbf3551674b9b841c3e301 Mon Sep 17 00:00:00 2001
From: Lindsay Holmwood <lindsay@holmwood.id.au>
Date: Thu, 29 Oct 2026 20:42:18 +1100
Subject: [PATCH] ci(runners): measure three jobs on GitHub-hosted runners (do
 not merge)

This is a measurement, not a change to keep. It runs Miri, tests-rust
and the Linux FFI release builds on GitHub's `ubuntu-24.04` runner. The
runner trial in #1297 did not time these jobs there.

A job that takes more than twice as long on GitHub's runner as on
Blacksmith 4 vCPU needs a bigger machine. The times from this branch
decide which runner each job uses.

The FFI builds take their Linux runner from `runnerFor` in
`scripts/ffi-release-matrix.mjs`. So that function changes too, and the
test that pins its answer fails on this branch.
---
 .github/workflows/_build-ffi-artifacts.yml | 2 +-
 .github/workflows/miri.yml                 | 2 +-
 .github/workflows/tests-rust.yml           | 2 +-
 scripts/ffi-release-matrix.mjs             | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/_build-ffi-artifacts.yml b/.github/workflows/_build-ffi-artifacts.yml
index 14b454141..c69d4bf51 100644
--- a/.github/workflows/_build-ffi-artifacts.yml
+++ b/.github/workflows/_build-ffi-artifacts.yml
@@ -358,7 +358,7 @@ jobs:
     # this job collects the six platform artifacts and uploads the complete set
     # as one artifact, so a caller downloads `ffi-tarballs` and has everything.
     needs: [binaries]
-    runs-on: blacksmith-4vcpu-ubuntu-2404
+    runs-on: ubuntu-24.04
     timeout-minutes: 45
     steps:
       - uses: actions/checkout@v6
diff --git a/.github/workflows/miri.yml b/.github/workflows/miri.yml
index 75711f5fd..ab5b9b6e0 100644
--- a/.github/workflows/miri.yml
+++ b/.github/workflows/miri.yml
@@ -40,7 +40,7 @@ env:
 jobs:
   miri-stack-guest-abi:
     name: Miri (stack-guest-abi)
-    runs-on: blacksmith-4vcpu-ubuntu-2404
+    runs-on: ubuntu-24.04
     timeout-minutes: 30
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
diff --git a/.github/workflows/tests-rust.yml b/.github/workflows/tests-rust.yml
index 1a1bdc388..ac2415b2b 100644
--- a/.github/workflows/tests-rust.yml
+++ b/.github/workflows/tests-rust.yml
@@ -58,7 +58,7 @@ concurrency:
 jobs:
   rust:
     name: cargo test + clippy + rustfmt
-    runs-on: blacksmith-4vcpu-ubuntu-2404
+    runs-on: ubuntu-24.04
     timeout-minutes: 45
     steps:
       - uses: actions/checkout@v6
diff --git a/scripts/ffi-release-matrix.mjs b/scripts/ffi-release-matrix.mjs
index c4475fbf7..f41c15d21 100644
--- a/scripts/ffi-release-matrix.mjs
+++ b/scripts/ffi-release-matrix.mjs
@@ -52,7 +52,7 @@ const PLATFORMS_DIR = join(
 export function runnerFor(platform) {
   if (platform.startsWith('win32')) return 'windows-latest'
   if (platform.startsWith('darwin')) return 'macos-latest'
-  return 'blacksmith-4vcpu-ubuntu-2404'
+  return 'ubuntu-24.04'
 }
 
 /**