# DEBUG definition

Source: https://ref.dm-lang.org/DM/preprocessor/define/DEBUG

### Format
> `#define DEBUG`

If `DEBUG` is defined, source file and line number information will be stored in the compiled `.dmb` file. If a proc crashes during execution and `DEBUG` information is present, the current source file name and line number will be indicated in the error output.

This option increases the size of the `.dmb`, typically by about 10%. Execution of the code may also be a tiny bit slower.

If you are distributing the `.dmb` to players and you do not want them to have debug access at runtime, you should *not* compile in debug mode.

If you want to use the run-time profiler (see the debugging options in Dream Seeker), you must compile in debug mode. Then you can get a report of CPU usage by your various procs.

### See also
> [#define directive](https://ref.dm-lang.org/DM/preprocessor/define/index.md)