<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:

with the <Chrono>.End function.
with the <Chrono>.Pause function.

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

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

with the ChronoValue function.
via the Value property of the Chrono variable.

Example

MonChrono1 is Chrono
MonChrono2 is Chrono
// Démarrage du premier chronomètre 
MonChrono1.Start()
// Démarrage du second chronomètre 
MonChrono2.Start()
// Arrêt premier chronomètre
DuréeChronoDébut is Duration = MonChrono1.End()
MaFonction()
// Arrêt du second chronomètre
DuréeMaFonction is Duration = MonChrono2.End()
Info("Le traitement MaFonction() a duré " + DuréeMaFonction, ...
	"Le traitement complet a duré " + DuréeChronoDébut)

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).

Component: wd300vm.dll