Stopwatch.StartNew Method
.NET Framework 4.5
Initializes a new Stopwatch instance, sets the elapsed time property to zero, and starts measuring elapsed time.
Namespace: System.Diagnostics
Assembly: System (in System.dll)
The following example uses the Stopwatch class to measure the performance of four different implementations for parsing an integer from a string. This code example is part of a larger example provided for the Stopwatch class.
long ticksThisTime = 0; int inputNum; Stopwatch timePerParse; switch (operation) { case 0: // Parse a valid integer using // a try-catch statement. // Start a new stopwatch timer. timePerParse = Stopwatch.StartNew(); try { inputNum = Int32.Parse("0"); } catch (FormatException) { inputNum = 0; } // Stop the timer, and save the // elapsed ticks for the operation. timePerParse.Stop(); ticksThisTime = timePerParse.ElapsedTicks; break; case 1: // Parse a valid integer using // the TryParse statement. // Start a new stopwatch timer. timePerParse = Stopwatch.StartNew(); if (!Int32.TryParse("0", out inputNum)) { inputNum = 0; } // Stop the timer, and save the // elapsed ticks for the operation. timePerParse.Stop(); ticksThisTime = timePerParse.ElapsedTicks; break; case 2: // Parse an invalid value using // a try-catch statement. // Start a new stopwatch timer. timePerParse = Stopwatch.StartNew(); try { inputNum = Int32.Parse("a"); } catch (FormatException) { inputNum = 0; } // Stop the timer, and save the // elapsed ticks for the operation. timePerParse.Stop(); ticksThisTime = timePerParse.ElapsedTicks; break; case 3: // Parse an invalid value using // the TryParse statement. // Start a new stopwatch timer. timePerParse = Stopwatch.StartNew(); if (!Int32.TryParse("a", out inputNum)) { inputNum = 0; } // Stop the timer, and save the // elapsed ticks for the operation. timePerParse.Stop(); ticksThisTime = timePerParse.ElapsedTicks; break; default: break; }
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
