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C# ProfileOptimization
Use the ProfileOptimization class. Benchmark profiling, which improves start up speed.ProfileOptimization. This helps programs start up faster. We call the SetProfileRoot and StartProfile methods at startup. At exit time, a profile file is created. At next startup, this profile is used to compile methods.Optimization
Note: ProfileOptimization requires a computer with at least 2 logical processor cores.
Note 2: If a single-core computer runs a ProfileOptimization program, the methods have no effect. They are silently ignored.
This program reveals the syntax of ProfileOptimization. Please add the System.Runtime with a using-directive. The SetProfileRoot method is called to indicate the folder where profiles are stored.
And: The StartProfile method specifies both the name of the profile file, and that profiling should begin.
Caution: To end profiling, the program must be exited normally—it cannot just be terminated.
C# program that uses ProfileOptimization
using System.Runtime;
class Program
{
static void Main()
{
// Profiles directory must exist.
// ... "profile" is created.
ProfileOptimization.SetProfileRoot("C:\\profiles\\");
ProfileOptimization.StartProfile("profile");
}
}
Discussion. I did not design the ProfileOptimization feature, so I can't describe its implementation in depth. But the general concept is that the profile contains a list of the methods that are required by the program on execution.
Then: When a profiled program starts up, the .NET Framework reads in the profile. It then compiles those methods on a separate thread.
And: This relieves the pause due to JIT-compilation for those needed methods. This reduces startup time.
Stop profiling. One problem I ran into when using ProfileOptimization is that a program must be closed normally for the profile to be written. If you just close a console window, the profile is not written.
Performance. A performance optimization that does not optimize performance is worthless. For small or fast-running programs, ProfileOptimization does not help much. But on certain programs, it is worthwhile.
Actual results. I have a program that requires about 1 second to run. It has about 30,000 lines of C# code. Most of its runtime is disk access and reads. But I enabled ProfileOptimization for a significant benefit.
Results: The program runs approximately 10% faster with a profile than without a profile.
ProfileOptimization results
Before: 1074 ms
1078 ms
1076 ms
After: 964 ms
962 ms
961 ms
Profiling a program improves startup speed. It works only on computers with multiple processor cores. The feature requires a call to ProfileOptimization.SetProfileRoot and StartProfile. We saw real performance results.
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- C# StartsWith and EndsWith String Methods
- C# Static Array
- C# Static Dictionary
- C# Stopwatch Examples
- C# Stream
- C# StreamReader ReadToEnd Example (Read Entire File)
- C# StreamReader ReadToEndAsync Example (Performance)
- C# StreamReader Examples
- C# StreamWriter Examples
- C# String Append (Add Strings)
- C# String Compare and CompareTo Methods
- C# String Constructor (new string)
- C# string.Copy Method
- C# CopyTo String Method: Put Chars in Array
- C# Empty String Examples
- C# String Equals Examples
- C# String For Loop, Count Spaces in String
- C# string.Intern and IsInterned
- C# String IsUpper, IsLower
- C# String Length Property: Get Character Count
- C# String Literal: Newline and Quote Examples
- C# StringBuilder Capacity
- C# StringBuilder Clear (Set Length to Zero)
- C# StringBuilder Data Types
- C# StringBuilder Performance
- C# StringBuilder Equals (If Chars Are Equal)
- C# StringBuilder Memory
- C# StringBuilder ToString: Get String From StringBuilder
- C# StringWriter Class
- C# Sum Method: Add up All Numbers
- C# Switch Char, Test Chars With Cases
- C# Switch Enum
- C# System (using System namespace)
- C# Tag Property: Windows Forms
- C# TextInfo Examples
- C# TextReader, Returned by File.OpenText
- C# TextWriter, Returned by File.CreateText
- C# this Keyword
- C# ThreadPool
- C# Thread Join Method (Join Array of Threads)
- C# ThreadPool.SetMinThreads Method
- C# TimeZone Examples
- C# Get Title From HTML With Regex
- C# ToArray Extension Method
- C# ToCharArray: Convert String to Array
- C# ToDictionary Method
- C# Token
- C# ToList Extension Method
- C# ToLookup Method (Get ILookup)
- C# ToLower and ToUpper: Uppercase and Lowercase Strings
- ToolStripContainer Control: Dock, Properties
- C# ToolTip: Windows Forms
- C# ToString Integer Optimization
- C# ToString: Get String From Object
- C# ToTitleCase Method
- C# TrackBar: Windows Forms
- C# Tree and Nodes Example: Directed Acyclic Word Graph
- C# TreeView Tutorial
- C# Trim Strings
- C# Thread Methods
- C# History
- C# Features
- C# Variables
- C# Data Types
- C# Operators
- C# Keywords
- C# New Features | C# Version Features
- C# Programs
- C# Program to swap numbers without third variable
- C# Program to convert Decimal to Binary
- C# Program to Convert Number in Characters
- C# Program to Print Alphabet Triangle
- C# Program to print Number Triangle
- C# Program to generate Fibonacci Triangle
- C# String Compare() method
- C# String CompareOrdinal() method
- C# String CompareTo() method
- C# String Concat() method
- C# String Contains() method
- C# String CopyTo() method
- C# String EndsWith() method
- C# String Equals() method
- C# String Format() method
- C# String IndexOf() method
- C# String Insert() method
- C# String Intern(String str) method
- C# String IsInterned() method
- C# String Normalize() method
- C# String IsNullOrEmpty() method
- C# String IsNullOrWhiteSpace() method
- C# String Join() method
- C# String LastIndexOf() method
- C# String LastIndexOfAny() method
- C# String PadLeft() method
- C# String PadRight() method
- C# Nullable
- C# String Remove() method
- C# String Replace() method
- C# String Split() method
- C# String StartsWith() method
- C# String SubString() method
- C# Partial Types
- C# Iterators
- C# Delegate Covariance
- C# Delegate Inference
- C# Anonymous Types
- C# Extension Methods
- C# Query Expression
- C# Partial Method
- C# Implicitly Typed Local Variable
- C# Object and Collection Initializer
- C# Auto Implemented Properties
- C# Dynamic Binding
- C# Named and Optional Arguments
- C# Asynchronous Methods
- C# Caller Info Attributes
- C# Using Static Directive
- C# Exception Filters
- C# Await in Catch Finally Blocks
- C# Default Values for Getter Only Properties
- C# Expression Bodied Members
- C# Null Propagator
- C# String Interpolation
- C# nameof operator
- C# Dictionary Initializer
- C# Pattern Matching
- C# Tuples
- C# Deconstruction
- C# Local Functions
- C# Binary Literals
- C# Ref Returns and Locals
- C# Expression Bodied Constructors and Finalizers
- C# Expression Bodied Getters and Setters
- C# Async Main
- C# Default Expression