Added lazy loading when showing grid to improve performance

Makefile

@@ -18,7 +18,9 @@ clean:
 	rm -rf Untitled*.ipynb
 	rm -rf .ipynb_checkpoints
 	rm -rf src/tools.db
+	rm -rf src/*.out
+	rm -rf src/*.prof
 	find . -name '.sesskey' -exec rm -rf {} +
 	find . -name '.pytest_cache' -exec rm -rf {} +
 	find . -name '__pycache__' -exec rm -rf {} +
-	find . -name 'debug.txt' -exec rm -rf {}
+	find . -name 'debug.txt' -exec rm -rf {}