Add benchmark script

Add a PowerShell script to run the benchmarks easily.

Author: martincostello

benchmark.ps1

@@ -0,0 +1,88 @@
+#! /usr/bin/env pwsh
+
+#Requires -PSEdition Core
+#Requires -Version 7
+
+param(
+    [Parameter(Mandatory = $false)][string] $Filter = "*",
+    [Parameter(Mandatory = $false)][string] $Job = ""
+)
+
+$ErrorActionPreference = "Stop"
+$ProgressPreference = "SilentlyContinue"
+
+$solutionPath = $PSScriptRoot
+$sdkFile = Join-Path $solutionPath "global.json"
+
+$dotnetVersion = (Get-Content $sdkFile | Out-String | ConvertFrom-Json).sdk.version
+
+$installDotNetSdk = $false
+
+if (($null -eq (Get-Command "dotnet" -ErrorAction SilentlyContinue)) -and ($null -eq (Get-Command "dotnet.exe" -ErrorAction SilentlyContinue))) {
+    Write-Host "The .NET SDK is not installed."
+    $installDotNetSdk = $true
+}
+else {
+    Try {
+        $installedDotNetVersion = (dotnet --version 2>&1 | Out-String).Trim()
+    }
+    Catch {
+        $installedDotNetVersion = "?"
+    }
+
+    if ($installedDotNetVersion -ne $dotnetVersion) {
+        Write-Host "The required version of the .NET SDK is not installed. Expected $dotnetVersion."
+        $installDotNetSdk = $true
+    }
+}
+
+if ($installDotNetSdk) {
+    ${env:DOTNET_INSTALL_DIR} = Join-Path $PSScriptRoot ".dotnetcli"
+    $sdkPath = Join-Path ${env:DOTNET_INSTALL_DIR} "sdk" $dotnetVersion
+
+    if (-Not (Test-Path $sdkPath)) {
+        if (-Not (Test-Path ${env:DOTNET_INSTALL_DIR})) {
+            mkdir ${env:DOTNET_INSTALL_DIR} | Out-Null
+        }
+        [Net.ServicePointManager]::SecurityProtocol = [Net.ServicePointManager]::SecurityProtocol -bor "Tls12"
+
+        if (($PSVersionTable.PSVersion.Major -ge 6) -And (-Not $IsWindows)) {
+            $installScript = Join-Path ${env:DOTNET_INSTALL_DIR} "install.sh"
+            Invoke-WebRequest "https://dot.net/v1/dotnet-install.sh" -OutFile $installScript -UseBasicParsing
+            chmod +x $installScript
+            & $installScript --jsonfile $sdkFile --install-dir ${env:DOTNET_INSTALL_DIR} --no-path
+        }
+        else {
+            $installScript = Join-Path ${env:DOTNET_INSTALL_DIR} "install.ps1"
+            Invoke-WebRequest "https://dot.net/v1/dotnet-install.ps1" -OutFile $installScript -UseBasicParsing
+            & $installScript -JsonFile $sdkFile -InstallDir ${env:DOTNET_INSTALL_DIR} -NoPath
+        }
+    }
+}
+else {
+    ${env:DOTNET_INSTALL_DIR} = Split-Path -Path (Get-Command dotnet).Path
+}
+
+$dotnet = Join-Path ${env:DOTNET_INSTALL_DIR} "dotnet"
+
+if ($installDotNetSdk) {
+    ${env:PATH} = "${env:DOTNET_INSTALL_DIR};${env:PATH}"
+}
+
+$benchmarks = (Join-Path $solutionPath "perf" "TodoApp.Benchmarks" "TodoApp.Benchmarks.csproj")
+
+Write-Host "Running benchmarks..." -ForegroundColor Green
+
+$additionalArgs = @()
+
+if (-Not [string]::IsNullOrEmpty($Filter)) {
+    $additionalArgs += "--filter"
+    $additionalArgs += $Filter
+}
+
+if (-Not [string]::IsNullOrEmpty($Job)) {
+    $additionalArgs += "--job"
+    $additionalArgs += $Job
+}
+
+& $dotnet run --project $benchmarks --configuration "Release" -- $additionalArgs