<Chrono>.Start (Function)

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<Chrono>.Start (Function)

In french: <Chrono>.Début

Starts a stopwatch to measure the duration of a process (in milliseconds) and resets a running stopwatch. The timing is stopped:

by <Chrono>.End.
by <Chrono>.Pause.

If timing is stopped, it can be restarted by <Chrono>.Resume.

The value of the stopwatch can be read at any time:

with ChronoValue.
Versions 24 and later
via the Value property of the Chrono variable.
New in version 24
via the Value property of the Chrono variable.
via the Value property of the Chrono variable.

Versions 17 and later

This function is now available for Windows Phone applications.

This function is now available for iPhone/iPad applications.

New in version 17

This function is now available for Windows Phone applications.

This function is now available for iPhone/iPad applications.

This function is now available for Windows Phone applications.

This function is now available for iPhone/iPad applications.

Versions 18 and later

This function is now available in Windows Store apps mode.

New in version 18

This function is now available in Windows Store apps mode.

Versions 21 and later

This function is now available in Apple Watch mode.

This function is now available in Universal Windows 10 App mode.

New in version 21

This function is now available in Apple Watch mode.

This function is now available in Universal Windows 10 App mode.

This function is now available in Apple Watch mode.

This function is now available in Universal Windows 10 App mode.

Example

MyChrono1 is Chrono
MyChrono2 is Chrono
// Start the first stopwatch
MyChrono1.Start()
// Start the second stopwatch
MyChrono2.Start()
// Stop the first stopwatch
DurationChronoStart is Duration = MyChrono1.End()
MyFunction()
// Stop the second stopwatch
DurationChronoStart is Duration = MyChrono2.End()
Info("The MyFunction() process lasted " + DurationMyFunction, ...
"The whole process lasted " + DurationChronoStart)

Syntax

Timing with a Chrono variable Hide the details

<Stopwatch>.Start()

<Stopwatch>: Chrono variable

Name of the Chrono variable that corresponds to the stopwatch to use.

Remarks

Error

A WLanguage error occurs ("The stopwatch is not started") if <Chrono>.Start was not called before ChronoValue and <Chrono>.End.

Threads and parallel tasks

Each thread (and each parallel task) includes its own stopwatches.

Two distinct threads (or two distinct parallel tasks) can perform separate timings by using the same stopwatch number.

The WLanguage error "The stopwatch is not started" will occur only if <Chrono>.Start is not called in the same thread (or in the same parallel task) as ChronoValue and <Chrono>.End.

Related Examples:

Unit examples (WINDEV): The Chrono functions

[ + ] Using the ChronoXXX functions.
These functions are used to calculate the time passed between the start (ChronoStart) and the end (ChronoEnd).

Unit examples (WINDEV): Calculations on durations

[ + ] Calculations on dates and times with the WLanguage functions:
- Calculate the duration between two moments (dates and times)
- Calculate a sum of durations
- Calculate an average of durations

Unit examples (WINDEV Mobile): The Chrono functions

[ + ] Using the WLanguage "Chrono" functions.
These functions are used to calculate the time passed between the start (ChronoStart) and the end (ChronoEnd).

Universal Apps (WINDEV Mobile): UWA Stopwatch

[ + ] This example explains how to create a stopwatch for a mobile device with WINDEV Mobile.
In this example, a timer is used to display the hands of the stopwatch and to display the time passed on a regular basis.

Component: wd270vm.dll