andrew.pardoe@microsoft.com
dotnetnative@microsoft.com
MSIL bytecode
Machine code
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C#
MSIL
MSIL  MDIL
MDIL

native
code
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Wordament on .NET Native:
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Scenario
Improvement (%)
Cold Startup
39.32%
Warm Startup
31.21%
Memory Usage
12.68%
Enable
.NET
Native for
your
project
Debug and
test your
app with
.NET
Native
- Compile C# source code
- Generate & compile marshalling
and serialization code
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- Merge all app & library code
- “Reduce” app to throw away unneeded
types, code, metadata, etc.
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<Directives xmlns="http://schemas.microsoft.com/netfx/2013/01/metadata">
<Application>
<Assembly Name="*Application*" Dynamic="Required All" />
<!-- Add your application specific runtime directives here. -->
</Application>
</Directives>
 The type specifies the class, namespace or assembly affected
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 The degree tells the compiler what behavior is needed
 Reflection behaviors, Serialization behaviors, Interop behaviors
 The policy notes the scope to apply that behavior inside the type
 Accessibility: All, Public, Private, Internal
 Required: Including this keyword means “Include these types in the final binary”
- C++ optimizer compiles MSIL to
MDIL, Machine Dependent
Intermediate Format. App is mostly
machine code but cannot execute.
- “Bind” MDIL app code into machine
code. App distributed as a stub,
app.exe, and app code in a dll. MRT
Runtime is distributed in the app
package, making the app package
self-sufficient.
for (long j = 0; j < numBodies; j++)
{
Float_4 r;
// From Nbody sample
r.x = A[j].pos.x - B.pos.x;
r.y = A[j].pos.y - B.pos.y;
r.z = A[j].pos.z - B.pos.z;
float distSqr = r.x * r.x + r.y * r.y + r.z * r.z;
distSqr += softeningSquared;
The C++
optimizer can
recognize this
code as
parallel and
generate
vector (SIMD)
instructions
float invDist = 1.0f / (float)Math1.Sqrt(distSqr);
float invDistCube = invDist * invDist * invDist;
float s = fParticleMass * invDistCube;
acc.x += r.x * s;
acc.y += r.y * s;
acc.z += r.z * s;
}
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