dadhi

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

dadhi

NuGet/Home#5986 (comment)

I've found that you can manually control which .dlls to reference and which .dlls to copy to output from a NuGet package if you turn off all assets on the PackageReference:

<PackageReference Include="Foo.MyPackage" Version="1.0.0" ExcludeAssets="all" GeneratePathProperty="true" />

and then manually reference the .dlls you need:

dadhi

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dadhi

A collapsible section containing markdown

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dadhi

<Project>

  <Import Project="Sdk.props" Sdk="Microsoft.NET.Sdk" />

  <PropertyGroup>
    <TargetFramework>netstandard1.0</TargetFramework>
    <IsPackable>true</IsPackable>
    <IncludeBuildOutput>false</IncludeBuildOutput>
    <ContentTargetFolders>contentFiles</ContentTargetFolders>
    <DisableImplicitFrameworkReferences>true</DisableImplicitFrameworkReferences>

dadhi

/*
Execute me as:
```
dotnet tool install dotnet-script
dotnet sctipt https://tinyurl.com/yylj3vcp
```
```cs */

#r "nuget: Microsoft.Extensions.DependencyInjection, 2.2.0"
#r "nuget: Microsoft.Extensions.Options, 1.0.0"

dadhi

Get-ChildItem .\ -include bin,obj -Recurse | foreach ($_) { remove-item $_.fullname -Force -Recurse }

dadhi

import zio._

object ZLayerPlayground {
  case class User(id: String, name: String)

  class MongoDb {
    def insertUser(user: User): Task[Unit] = Task.succeed(()) <* UIO(println(s"[MongoDb]: Inserted user $user"))
  }

  object MongoDbLayer {

dadhi

<Project Sdk="Microsoft.NET.Sdk">
    <PropertyGroup>
        <OutputType>Exe</OutputType>
        <TargetFramework>net5.0</TargetFramework>
        <LangVersion>preview</LangVersion>
    </PropertyGroup>
    <ItemGroup>
        <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="5.0.0-preview.3.20215.2" />
    </ItemGroup>
    <ItemGroup>

dadhi

/* 
sources: 

- http://www.adammil.net/blog/v111_Creating_High-Performance_Locks_and_Lock-free_Code_for_NET_.html
- http://badamczewski.blogspot.com/2012/08/lock-free-and-spinwait-msdn-example.html

A better spin lock:

The result is a spin lock that's quite fast — about twice as fast as locking with a Monitor (or the C# lock statement). 
(It can be further sped up slightly by breaking the Enter method into two methods: Enter,