ONLINE HELP
 WINDEVWEBDEV AND WINDEV MOBILE

This content has been translated automatically.  Click here  to view the French version.
Help / WLanguage / WLanguage functions / Standard functions / Date and time functions
  • Error
  • Threads and parallel tasks
WINDEV
WindowsLinuxJavaReports and QueriesUser code (UMC)
WEBDEV
WindowsLinuxPHPWEBDEV - Browser code
WINDEV Mobile
AndroidAndroid Widget iPhone/iPadIOS WidgetApple WatchMac Catalyst
Others
Stored procedures
Starts a stopwatch to measure the duration of a process (in milliseconds) and resets a running stopwatch. The timing is stopped: If timing is stopped, it can be restarted with ChronoResume.
The value of the stopwatch can be read at any time:
New in version 2025
WEBDEV - Browser code Variables of type Chrono are now available in browser code. The syntax for handling Chrono variables also becomes available.
Example
// Start the stopwatch 
ChronoStart()
MyFunction()
// Stop the stopwatch 
DurationMyFunction is Duration = ChronoEnd()
Info("The MyFunction() process lasted " + DurationMyFunction)
// Start the first stopwatch 
ChronoStart(1)
// Start the second stopwatch 
ChronoStart(2)
// Stop the first stopwatch
DurationChronoStart is Duration = ChronoEnd(1)
MyFunction()
// Stop the second stopwatch
DurationMyFunction is Duration = ChronoEnd(2)
Info("MyFunction() process lasted" + DurationMyFunction, ...
	"The whole process lasted " + DurationChronoStart)
WEBDEV - Browser codeReports and QueriesWindowsLinuxAndroidAndroid Widget iPhone/iPadIOS WidgetApple WatchMac CatalystJavaUser code (UMC)
MyChrono1 is Chrono
MyChrono2 is Chrono
// Start the first stopwatch 
ChronoStart(MyChrono1)
// Start the second stopwatch 
ChronoStart(MyChrono2)
// Stop the first stopwatch
DurationChronoStart is Duration = ChronoEnd(MyChrono1)
MyFunction()
// Stop the second stopwatch
DurationMyFunction is Duration = ChronoEnd(MyChrono2)
Info("The MyFunction() process lasted " + DurationMyFunction, ...
	"The whole process lasted " + DurationChronoStart)
Syntax

Timing with a stopwatch number Hide the details

ChronoStart([<Stopwatch number>])
<Stopwatch number>: Optional integer
Identifier of stopwatch used.
If this parameter is not specified, its default value is set to 1.
If this number corresponds to a running stopwatch, it is reset to zero.
PHP This syntax is not available in PHP

Timing with a Chrono variable Hide the details

ChronoStart(<Stopwatch>)
<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 ChronoStart was not called before ChronoValue and ChronoEnd.

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 ChronoStart is not called in the same thread (or in the same parallel task) as ChronoValue and ChronoEnd.
Related Examples:
The Chrono functions 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).
Calculations on durations 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
The Chrono functions 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).
Business / UI classification: Neutral code
Component: wd300vm.dll
Minimum version required
  • Version 10
This page is also available for…
Comments
Click [Add] to post a comment

Last update: 11/05/2024

Send a report | Local help