Improving Performance in .NET Applications

Jason BockPractice Lead

»http://www.magenic.com

»http://www.jasonbock.net

»https://www.twitter.com/jasonbock

»https://www.github.com/jasonbock

» jasonb@magenic.com

Personal Info

https://github.com/JasonBock/

ImprovingPerformance

http://www.slideshare.net/jasonbock/improving-performance-in-net-applications-41569122

Downloads

»Performance

»Techniques, Tools and Tips

Overview

Remember…

https://github.com/JasonBock/

ImprovingPerformance

http://www.slideshare.net/jasonbock/improving-performance-in-net-applications-41569122

Performance

http://citeseerx.ist.psu.edu/viewdoc/download;jsessionid=2B7D23F17D6379CCABDACC32C0E02140?doi=10.1.1.

103.6084&rep=rep1&type=pdf

http://muhammedozdemir.files.wordpress.com/2010/11/donald_knuth.jpg

“Premature optimization is the root of all evil” – Donald

Knuth

Performance

http://joeduffyblog.com/2010/09/06/the-premature-optimization-is-evil-myth/

“Mostly this quip is used defend sloppy decision-making, or to justify the indefinite deferral of decision-making. In other words, laziness. It

is safe to say that the very mention of this oft-misquoted phrase causes an immediate visceral reaction to commence within me… and

it’s not a pleasant one.” – Joe Duffy

“A phrase like ‘premature optimization is the root of all evil’ is not a get out of jail card for being lazy.” – Richard Brantley

Performance

http://1.bp.blogspot.com/_EUzvVB2uRZI/TM5LHdryAoI/AAAAAAAAAJM/Dyajh-

EwctY/s1600/computer+on+fire.png

Performance

http://stackexchange.com/performance

…

Performance

http://www.troyhunt.com/2014/12/applied-azure-infographic-of-how-have-i.html

Performance

http://lifehackery.com/qimages/6/pentiumee_processor_back.jpg

http://www.ikea.com/us/en/images/products/sy-sewing-thread__63544_PE171202_S4.JPG

http://www.gup20.com/images/folders.jpg

Performance

UI

Service

Business Logic

Data Store

Core

Message Bus

CLR

»Memory management

»Garbage collection

»Code loading and execution

»Structured exception handling

»Common type system

»Security

Performance

Performance

http://www.clker.com/cliparts/I/b/r/1/6/n/simple-green-check-button-hi.png

Techniques, Tools and Tips

Techniques, Tools and Tips

http://www.stellman-greene.com/blog/wp-content/uploads/2008/09/sally-code-review.png

Techniques, Tools and Tips

http://en.wikipedia.org/wiki/Sch%C3%B6nhage%E2%80%93Strassen_algorithm

346* 27

422821

1286

439 2

Grade school: O(n2)

Schönhage–Strassen:O(n log n log log n)

Techniques, Tools and Tips

Techniques, Tools and Tips

http://groomsadvice.com/wp-content/uploads/2011/05/bigstock_Tape_Measure_14084828.jpg

Techniques, Tools and Tips

http://cdn2.whatchristianswanttoknow.com/wp-content/uploads/2014/01/10-Convicting-Questions-To-Ask-Yourself-

Today.jpg

Techniques, Tools and Tipsprivate static BigInteger MultiplyViaOperation(BigInteger a, BigInteger b){return a * b;

}

private static BigInteger MultiplyViaAddition(BigInteger a, BigInteger b){var result = BigInteger.Zero;

var value = BigInteger.Abs(a);for (var i = BigInteger.Zero; i < BigInteger.Abs(b); i++){result += value;

}

return a.Sign < 0 ^ b.Sign < 0 ? BigInteger.Negate(result) : result;}

Techniques, Tools and Tipsprivate static void NaiveTimeTest(BigInteger a, BigInteger b){var operationTime = Stopwatch.StartNew();Program.MultiplyViaOperation(a, b);operationTime.Stop();

Console.Out.WriteLine("NaiveTestTime.MultiplyViaOperation({0}, {1}) time: {2}",a, b, operationTime.Elapsed);

var additionTime = Stopwatch.StartNew();Program.MultiplyViaAddition(a, b);additionTime.Stop();

Console.Out.WriteLine("NaiveTestTime.MultiplyViaAddition({0}, {1}) time: {2}",a, b, additionTime.Elapsed);

}

Techniques, Tools and Tips

Techniques, Tools and Tips

NaiveTestTime.MultiplyViaOperation(3, 2) time: 00:00:00.0001387NaiveTestTime.MultiplyViaAddition(3, 2) time: 00:00:00.0004056NaiveTestTime.MultiplyViaOperation(30, 20) time: 00:00:00.0000931NaiveTestTime.MultiplyViaAddition(30, 20) time: 00:00:00.0002379NaiveTestTime.MultiplyViaOperation(3000, 2000) time: 00:00:00.0001246NaiveTestTime.MultiplyViaAddition(3000, 2000) time: 00:00:00.0005413NaiveTestTime.MultiplyViaOperation(300000, 200000) time: 00:00:00.0000897NaiveTestTime.MultiplyViaAddition(300000, 200000) time: 00:00:00.0461862NaiveTestTime.MultiplyViaOperation(30000000, 20000000) time: 00:00:00.0000885NaiveTestTime.MultiplyViaAddition(30000000, 20000000) time: 00:00:04.6905107

Techniques, Tools and Tips

Techniques, Tools and Tips

NaiveTestTime.MultiplyViaOperation(30000000, 0) time: 00:00:00.0001045NaiveTestTime.MultiplyViaAddition(30000000, 0) time: 00:00:00.0002622NaiveTestTime.MultiplyViaOperation(0, 30000000) time: 00:00:00.0000007NaiveTestTime.MultiplyViaAddition(0, 30000000) time: 00:00:02.9542725

Techniques, Tools and Tipsprivate static BigInteger result;

private static void Execute(BigInteger[] values, Func<BigInteger, BigInteger, BigInteger> f)

{GC.Collect();GC.WaitForPendingFinalizers();GC.Collect();

Program.result = f(new BigInteger(200), new BigInteger(300));

// ...

Techniques, Tools and Tips// ...

var operationTime = new Stopwatch();

for(var i = 0; i < values.Length / 2; i++){var a = values[i];var b = values[i + 1];operationTime.Start();Program.result = f(a, b);operationTime.Stop();

}

Console.Out.WriteLine("Execute time: {0}", operationTime.Elapsed);}

Techniques, Tools and Tips

var data = Program.Generate(50, 4);Program.Execute(data, Program.MultiplyViaOperation);Program.Execute(data, Program.MultiplyViaAddition);

»Task Manager

»Performance Monitor

»PerfView

»MiniProfiler

»CLRProfiler

»MeasureIt

»WinDbg

»Visual Studio

Techniques, Tools and Tips

http://www.machinemart.co.uk/images/library/range/large/1010.jpg

Demo: Using Tools to Analyze CodeCode Reactions – An Introduction to Reactive Extensions

»Make all compilation warning errors

»Optimize your release build

»Don’t run performance tests with the debugger attached

»Stop other applications from running during tests

»Remove exception handling (int.Parse() vs int.TryParse())

»ConfigureAwait(false) whenever possible

» If possible, consider using structs

Techniques, Tools and Tips

»Unroll LINQ statements (in certain situations)

»Limit Reflection, consider code generation scenarios

»Use WeakEventHandler

»Be aware of boxing

»Keep methods small (easier to analyze and refactor)

Techniques, Tools and Tips

Techniques, Tools and Tips

http://blogs.studentlife.utoronto.ca/gradlife/files/2011/10/library12.jpg

Improving Performance in .NET Applications

Jason BockPractice Lead

Remember… https://github.com/JasonBock/ImprovingPerformance http://www.slideshare.net/jasonbock/improving-performance-in-

net-applications-41569122 References in the notes on this slide