Reasons to remove debug=true from web.config

Before deploying your web application, always ensure that debug=true is removed. These are some side effects of leaving this in, which might be useful while debugging, but which be a huge cost once you go live.

• Files needed for your application are not created immediately.
• Temporary files are created
• There is no timeout in debugging
• Batch compilation is disabled
• System.Diagnostics.DebuggableAttribute gets added to all generated code which causes performance degradation.
• Scripts and images are not cached