Run tests with appropriate number of threads.

Author: maleadt

.github/workflows/ci.yml

@@ -16,6 +16,7 @@ jobs:
       matrix:
         version:
           - '1.5'
+          - '1.6-nightly'
           - 'nightly'
         os:
           - ubuntu-latest
@@ -29,6 +30,10 @@ jobs:
         with:
           version: ${{ matrix.version }}
           arch: ${{ matrix.arch }}
+      - name: Retrieve system info
+        run: |
+          echo "::set-output name=cpu_threads::$(julia -e 'println(Sys.CPU_THREADS)')"
+        id: sysinfo
       - uses: actions/cache@v1
         env:
           cache-name: cache-artifacts
@@ -44,6 +49,8 @@ jobs:
           git config --global user.name Tester
           git config --global user.email te@st.er
       - uses: julia-actions/julia-runtest@latest
+        env:
+          JULIA_NUM_THREADS: ${{ steps.sysinfo.outputs.cpu_threads }}
         continue-on-error: ${{ matrix.version == 'nightly' }}
       - uses: julia-actions/julia-processcoverage@v1
       - uses: codecov/codecov-action@v1