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Debugging · MapsterMapper/Mapster Wiki · GitHub
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Debugging
Atilla Lonny edited this page Aug 13, 2020
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13 revisions
PM> Install-Package ExpressionDebugger
This plugin allows you to perform step-into debugging using Roslyn!
Then add following code on start up (or anywhere before mapping is compiled)
TypeAdapterConfig.GlobalSettings.Compiler = exp => exp.CompileWithDebugInfo();
Now in your mapping code (only in DEBUG
mode).
var dto = poco.Adapt<SimplePoco, SimpleDto>(); //<--- you can step-into this function!!
private
, protected
and internal
aren't allowed in debug mode.
We can also see how Mapster generates mapping logic with ToScript
method.
var script = poco.BuildAdapter()
.CreateMapExpression<SimpleDto>()
.ToScript();
To step-into debugging, you might need to emit file
var opt = new ExpressionCompilationOptions { EmitFile = true };
TypeAdapterConfig.GlobalSettings.Compiler = exp => exp.CompileWithDebugInfo(opt);
...
var dto = poco.Adapt<SimplePoco, SimpleDto>(); //<-- you can step-into this function!!
In RELEASE
mode, Roslyn compiler is actually faster than default dynamic compilation by 2x.
Here is the result:
Method | Mean | StdDev | Error | Gen 0 | Gen 1 | Gen 2 | Allocated |
---|---|---|---|---|---|---|---|
'Mapster 4.1.1' | 115.31 ms | 0.849 ms | 1.426 ms | 31000.0000 | - | - | 124.36 MB |
'Mapster 4.1.1 (Roslyn)' | 53.55 ms | 0.342 ms | 0.654 ms | 31100.0000 | - | - | 124.36 MB |
- Configuration
- Config inheritance
- Config instance
- Config location
- Config validation & compilation
- Config for nested mapping
- Custom member matching logic
- Constructor mapping
- Before & after mapping
- Setting values
- Shallow & merge mapping
- Recursive & object references
- Custom conversion logic
- Inheritance
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