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Reading Embedded Portable PDBs

This example shows how to read an embedded portable PDB file using the System.Reflection.Metadata classes.

Method	Mean	Error	StdDev
Command	403.4 µs	7.959 µs	19.069 µs
Commands	775.9 µs	15.357 µs	28.465 µs
PreparedCommand	359.8 µs	4.708 µs	4.174 µs
PreparedCommands	726.8 µs	14.508 µs	14.899 µs
BatchCommand	390.2 µs	7.572 µs	7.776 µs
BatchCommands	390.5 µs	7.548 µs	10.077 µs

	using BenchmarkDotNet.Attributes;
	using BenchmarkDotNet.Running;
	using System.Diagnostics.CodeAnalysis;
	using System.Text;

	var summary = BenchmarkRunner.Run<Lookups>();

	[MemoryDiagnoser]
	public class Lookups
	{

	using MySqlConnector;
	using System.Diagnostics;

	var threadCount = args.Length == 1 && int.TryParse(args[0], out var tc) ? tc : 100;

	var csb = new MySqlConnectionStringBuilder
	{
	Server = // REDACTED
	UserID = // REDACTED
	Password = // REDACTED

	using Dapper;
	using MySqlConnector;

	await MethodToRunAsync();

	async Task Method1Async()
	{
	using (var domain = new MySqlConnection())
	{
	await domain.OpenDBAsync();

	static readonly object s_lock = new object();
	static readonly SemaphoreSlim s_semaphore = new SemaphoreSlim(1);
	static int s_data;

	[Benchmark]
	public int Lock()
	{
	lock (s_lock)
	{
	s_data++;

	// Licensed to the .NET Foundation under one or more agreements.
	// The .NET Foundation licenses this file to you under the MIT license.
	// See the LICENSE file in the project root for more information.

	namespace System.Runtime.CompilerServices
	{
	internal static class RuntimeHelpers
	{
	/// <summary>
	/// Slices the specified array using the specified range.

	HRESULT FontFileStream::ReadFileFragment(const void fragmentStart, UINT64 fileOffset, UINT64 fragmentSize, void fragmentContext)
	{
	if (fragmentStart != nullptr)
	*fragmentStart = nullptr;
	if (fragmentContext != nullptr)
	*fragmentContext = nullptr;
	if (fragmentStart == nullptr \|\| fragmentContext == nullptr)
	return E_POINTER;
	if (fileOffset >= m_length \|\| fileOffset + fragmentSize > m_length)
	return E_INVALIDARG;