Comments (4)
An example snippet of generated code:
public partial ObjectsMapperBenchmark.SpotifyAlbum? Map(ObjectsMapperBenchmark.SpotifyAlbumDto? spotifyAlbumDto)
{
if (spotifyAlbumDto == null)
return default;
var target = new ObjectsMapperBenchmark.SpotifyAlbum();
target.AlbumType = spotifyAlbumDto.AlbumType;
if (spotifyAlbumDto.Artists != null)
{
target.Artists = MapToArtistArray(spotifyAlbumDto.Artists);
}
// ...
return target;
}
private ObjectsMapperBenchmark.Artist? MapToArtist(ObjectsMapperBenchmark.ArtistDto? source)
{
if (source == null)
return default;
var target = new ObjectsMapperBenchmark.Artist();
if (source.ExternalUrls != null)
{
target.ExternalUrls = MapToExternalUrls(source.ExternalUrls);
}
target.Href = source.Href;
target.Id = source.Id;
target.Name = source.Name;
target.Type = source.Type;
target.Uri = source.Uri;
return target;
}
private ObjectsMapperBenchmark.Artist[] MapToArtistArray(ObjectsMapperBenchmark.ArtistDto[] source)
{
var target = new ObjectsMapperBenchmark.Artist[source.Length];
for (var i = 0; i < source.Length; i++)
{
target[i] = MapToArtist(source[i]);
}
return target;
}
Mapperly is only faster than naive manual mapping approaches (eg. https://github.com/mjebrahimi/Benchmark.netCoreMappers/blob/master/ObjectsMapperBenchmark/ManuallyMapper.cs). The main performance factor is the LINQ usage.
Mapperly cannot beat an optimized, manually written mapping method, but developers are often lazy and write sub-optimal code. We'll add samples (both of the usage and the generated code) to our documentation.
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Also, it would be nice to see some source code you generate, since one of the claims is that Mapperly is even faster than the naive manual mapping.
from mapperly.
Damn, you just gave me a reality check :| I'm one of those devs that maps objects like the example in ManyallyMapper.cs.
from mapperly.
🎉 This issue has been resolved in version 2.6.0 🎉
The release is available on:
- GitHub release
v2.6.0
Your semantic-release bot 📦🚀
from mapperly.
Related Issues (20)
- RMG009 is reported for same-name target property even if the value is mapped to a different property HOT 6
- Emit more readable constructor mapping code HOT 2
- Add option to only set target properties if it is null or default value HOT 1
- Expression bodied mappers HOT 1
- New warning given when mapping to different type (regression from 3.5.1 -> 3.6.0) HOT 1
- Generic mapping for existing target object
- Supporting `MapPropertyFromSource` for `IQueryable`-projections HOT 3
- Invalid rank specifier: expected ',' or ']' when IReadOnlyList of IReadOnlyList is used
- Mapperly won't include renamed collection property HOT 4
- Using AggressiveInlining for generated mapping methods HOT 9
- Computed read-only properties causing RMG066 warning HOT 2
- Generator 'MapperGenerator' failed to generate source. It will not contribute to the output and compilation errors may occur as a result. HOT 13
- Queryable projections: Inline user-implemented mapping expressions from different file HOT 3
- Generic Existing Object Mapping HOT 5
- CS0618 Obsolete member fails build when TreatWarningsAsErrors is set HOT 1
- before/ after map can't work well with IQueryable projections HOT 1
- Merging two objects into a new target instance HOT 1
- Add support for mapping method parameters to the target type properties HOT 2
- NullReferenceException due to uninitialized nested property object
- Source generator slowing down build
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