1. Turn off debug info collection and API: - https://github.com/yiisoft/yii-debug/blob/master/config/params.php#L31 - https://github.com/yiisoft/yii-debug-api/blob/master/config/params.php#L10 2. https://github.com/yiisoft/docs/blob/master/guide/en/tutorial/performance-tuning.md if possible. 3. https://github.com/yiisoft/yii-cycle/blob/master/docs/en/reading-schema.md#schema-cache
