Try out the azure vms

.cirun.yml

@@ -0,0 +1,18 @@
+runners:
+  # Arm64 machines.
+  - name: win11-23h2-pro-arm64-16
+    cloud: azure
+    instance_type: Standard_D16plds_v5
+    machine_image: "/subscriptions/88c2ce23-b441-4d79-8f1c-50d9bc95ed08/resourceGroups/Win-CI/providers/Microsoft.Compute/galleries/base_images/images/win11-23h2-pro-arm64/versions/2024.04.22"
+    labels:
+      - cirun-win11-23h2-pro-arm64-16-2024-04-22
+    extra_config:
+      runner_path: "D:\\r"
+      runner_user: runner
+      run_as: interactive
+    idle:
+      schedule:
+        - day: mon-fri
+          time: 6-20
+          timezone: "America/New_York"
+          replicas: 0

.github/workflows/release-swift-toolchain-binary-sizes.yml

@@ -34,7 +34,7 @@ env:
 jobs:
   binary_size_data:
     name: Generate Swift toolchain binary size data
-    runs-on: windows-latest
+    runs-on: cirun-win11-23h2-pro-arm64-16-2024-04-22
     permissions:
       contents: read
       # required to make OIDC work
@@ -47,7 +47,7 @@ jobs:
 
     strategy:
       matrix:
-        toolchain_arch: [amd64]
+        toolchain_arch: [arm64]
 
     steps:
       - name: Checkout swift-build