3 ms·

CLR apps require just in time compiling which can take a little time to first run. So this should speed up opening the apps.

tdicola 13y ago
Sure, but ngen solved that problem years ago: http://msdn.microsoft.com/en-us/library/6t9t5wcf(v=vs.110).aspx http://msdn.microsoft.com/en-us/library/6t9t5wcf(v=vs.110).a...
- itsboring 13y ago
  Yeah, and mono's AOT too. I wonder if this is really just ngen integration into VS and thus not really a big deal.
- spo81rty 13y ago
  So I guess this is ngen in the cloud to skip doing it on the PC.
  - sriramk 13y ago
    If I remember ngen is very architecture/platform specific - that is why it has to be done on the target machine. This sounds like it is done ahead of time with support for a variety of architectures.
- andyjohnson0 13y ago
  See https://news.ycombinator.com/item?id=7520687 https://news.ycombinator.com/item?id=7520687
itsboring 13y ago
It seems like this is basically just the same thing that Mono has done for a long time with AOT. I'm not really sure how it differs from the Ngen tool, though.
- apardoe-MSFT 13y ago
  .NET Native addresses many of the same issues as Mono AOT but it has a radically different basis. We had the advantage of hindsight :) The biggest difference with NGen is the fact that .NET Native doesn't ever "fall back" to JIT compiled code. There are other differences--refactored runtime, static-optimized libraries, static marshalling, etc.--which can be seen by the perf wins over NGen. We're seeing 40% startup performance gain over NGen apps for top Windows Store apps.
  - rajeevk 13y ago
    @apardoe, one question: where will the compilation to machine instruction happen? From some comments in this thread, it seems that it will happen at app store server and not at developer's box. If that is the case then why will I need anything to do any settings in VS for building projects?
    - apardoe-MSFT 13y ago
      @rajeevk, we could compile from MSIL and not tell the developer. But you probably appreciate the chance to test out the app on your own the way your user will run it. After all, you'll want to profile it or maybe find that last on-device, optimized-only bug...
      - thomasz 13y ago
        What about stuff like Il.Emit and Expression<T>.Compile
        apardoe-MSFT 13y ago
        Reflection.Emit isn't allowed in the Windows Store profile so we haven't handled it in this go-around. Expression compile is supported and handled properly.

tdicola 13y ago

Sure, but ngen solved that problem years ago: http://msdn.microsoft.com/en-us/library/6t9t5wcf(v=vs.110).aspx http://msdn.microsoft.com/en-us/library/6t9t5wcf(v=vs.110).a...

itsboring 13y ago
Yeah, and mono's AOT too. I wonder if this is really just ngen integration into VS and thus not really a big deal.
spo81rty 13y ago
So I guess this is ngen in the cloud to skip doing it on the PC.
- sriramk 13y ago
  If I remember ngen is very architecture/platform specific - that is why it has to be done on the target machine. This sounds like it is done ahead of time with support for a variety of architectures.
andyjohnson0 13y ago
See https://news.ycombinator.com/item?id=7520687 https://news.ycombinator.com/item?id=7520687

itsboring 13y ago

It seems like this is basically just the same thing that Mono has done for a long time with AOT. I'm not really sure how it differs from the Ngen tool, though.

apardoe-MSFT 13y ago
.NET Native addresses many of the same issues as Mono AOT but it has a radically different basis. We had the advantage of hindsight :) The biggest difference with NGen is the fact that .NET Native doesn't ever "fall back" to JIT compiled code. There are other differences--refactored runtime, static-optimized libraries, static marshalling, etc.--which can be seen by the perf wins over NGen. We're seeing 40% startup performance gain over NGen apps for top Windows Store apps.
- rajeevk 13y ago
  @apardoe, one question: where will the compilation to machine instruction happen? From some comments in this thread, it seems that it will happen at app store server and not at developer's box. If that is the case then why will I need anything to do any settings in VS for building projects?
  - apardoe-MSFT 13y ago
    @rajeevk, we could compile from MSIL and not tell the developer. But you probably appreciate the chance to test out the app on your own the way your user will run it. After all, you'll want to profile it or maybe find that last on-device, optimized-only bug...
    - thomasz 13y ago
      What about stuff like Il.Emit and Expression<T>.Compile
      - apardoe-MSFT 13y ago
        Reflection.Emit isn't allowed in the Windows Store profile so we haven't handled it in this go-around. Expression compile is supported and handled properly.