Good performance is crucial for online businesses and it should be taken very seriously. While this is common knowledge, it is usually not prioritized in development cycles. This leads to higher development cost as teams found themselves in situations of fire-fighting. By integrating performance management early in the development process, the cost are reduced, chances of performance regression are lessened, same as the business risks. Using Blackfire, we will see why performance management should be integrated in a SymfonyCloud project early in every environments from development to testing to production.