AutoMapper Patcher

Removing AutoMapper (at runtime) with Jitex to increase performance.

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This code:

PersonViewModel vm = Mapper.Map<PersonViewModel> (_person);

Will be replaced by this:

PersonViewModel vm = new PersonViewModel();
vm.Name = _person.Name,
vm.Username = _person.Name;
vm.BirthDate = _person.BirthDate;
vm.Street = _person.Street;
//...

Packages used

• AutoMapper 10.0.0
• Jitex 3.0.4-alpha

Result

BenchmarkDotNet=v0.12.1, OS=Windows 10.0.19041.508 (2004/?/20H1)
Intel Core i5-7600 CPU 3.50GHz (Kaby Lake), 1 CPU, 4 logical and 4 physical cores
.NET Core SDK=3.1.402
  [Host]     : .NET Core 3.1.8 (CoreCLR 4.700.20.41105, CoreFX 4.700.20.41903), X64 RyuJIT
  DefaultJob : .NET Core 3.1.8 (CoreCLR 4.700.20.41105, CoreFX 4.700.20.41903), X64 RyuJIT

Method	Mean	Error	StdDev
MapWithJitex	18.31 ns	0.349 ns	0.402 ns
MapWithoutJitex	154.68 ns	2.672 ns	3.077 ns

Code

/// <summary>
/// Method to patch
/// </summary>
/// <returns></returns>
public PersonViewModel MapWithJitex () {
    PersonViewModel vm = Mapper.Map<PersonViewModel> (_person);
    return vm;
}

/// <summary>
/// Method to not patch (AutoMapper)
/// </summary>
/// <returns></returns>
public PersonViewModel MapWithoutJitex () {
    PersonViewModel vm = Mapper.Map<PersonViewModel> (_person);
    return vm;
}

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This is just a PoC. To work more properly, it's necessary more some implementations on Patcher. It's just an example, it's not to be used in real world.