Improved performance and fixed Clang warnings.

.github/workflows/ci.yml

@@ -88,7 +88,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        python -m pip install wcwidth
+        # python -m pip install wcwidth
         if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
     - name: Script
       run: |