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It’s difficult to improve what you can’t measure! Profiling an application should always be the first step in trying to improve its performance. In this workshop, you’ll learn how to deploy a Symfony application on Platform.sh, and then set up a local development environment and profile the app using Blackfire.io. You’ll learn how to adopt the best profiling practices into your daily development habits, how to identify performance issues in your application, and then compare those profiles across development environments to incrementally improve the production app. This workshop will use the Blackfire.io tool to help you identify performance leaks and Platform.sh to deploy the Symfony application.