C# 7 and .NET Core 2.0 High Performance
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How releasing builds increases performance

Release and debug builds are two build modes provided in .NET applications. Debug mode is mostly used when we are in the process of writing code or troubleshooting errors, whereas release build mode is often used while packaging the application to deploy on production servers. When developing the deployment package, developers often miss updating the build mode to the release build, and then they face performance issues when the application is deployed:

The following table shows some differences between the debug and release modes:

Debug

Release

No optimization of code is done by the compiler

Code is optimized and minified in size when built using release mode

Stack trace is captured and thrown at the time of exception

No stack trace is captured

The debug symbols are stored

All code and debug symbols under #debug directives are removed

More memory is used by the source code at runtime

Less memory is used by the source code at runtime