parallelize notebook exec

.github/workflows/examples_check.yml

@@ -49,10 +49,16 @@ jobs:
     - name: Execute notebooks and check for errors
       run: |
         cd docs/examples
-        for notebook in $(ls *.ipynb); do
-          poetry run jupyter nbconvert --to notebook --execute "$notebook"
-          if [ $? -ne 0 ]; then
-            echo "Error found in $notebook"
-            exit 1
-          fi
-        done
+        # Function to process a notebook
+        process_notebook() {
+            notebook="$1"
+            echo "Processing $notebook..."
+            jupyter nbconvert --to notebook --execute "$notebook"
+            if [ $? -ne 0 ]; then
+                echo "Error found in $notebook"
+                exit 1
+            fi
+        }
+        export -f process_notebook  # Export the function for parallel execution
+        # Run in parallel
+        ls *.ipynb | parallel process_notebook