add multithreading CI test

Author: aviatesk

.github/workflows/ci.yml

@@ -83,6 +83,26 @@ jobs:
       - uses: julia-actions/julia-processcoverage@v1
       - uses: codecov/codecov-action@v5
 
+  multithreading-test:
+    name: JULIA_NUM_THREADS=4,2
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+      - uses: julia-actions/setup-julia@v2
+        with:
+          version: "1"
+          arch: x64
+      - uses: julia-actions/cache@v2
+      - name: set preferences
+        working-directory: .
+        run: |
+          echo '[JET]
+          JET_DEV_MODE = true' >  LocalPreferences.toml
+      - uses: julia-actions/julia-buildpkg@latest
+      - uses: julia-actions/julia-runtest@latest
+        env:
+          JULIA_NUM_THREADS: "4,2"
+
   empty-loading-test:
     runs-on: ubuntu-latest
     steps: