file open and file close why to use them ?

[Alexxander]

hi 

i was playing with the files functions and i found that when i use file open and file close or not i get he same result wen  using wile write

can anyone tell me the what is the Interest of using file open and  file close ?

[Melba23]

Alexxander,

If you are going to carry out multiple actions on a file it is quicker to open it, use the returned handle to identify the file for the actions and then close it again once everything is done. If you use the file name to identify the file then it is opened and closed for each action - the overhead for every action makes this method demonstrably slower. Of course, if all you are doing is a single write then there is no appreciable difference.

But you must choose either one method or the other - do not mix file handles and filenames or it will end in tears.

M23

[Alexxander]

Melba23

 

thanks man you are an awesome teacher ...

[JLogan3o13]

A good lesson to learn indeed. One of my first scripts saved a reg hive and then parsed through it. You don't notice the extreme difference until you test out something like this:

11 seconds

For $i = 1 To 10000
    FileWriteLine(@DesktopDir & "\Test.txt", "Line " & $i)
Next

Vs. this:

.767 seconds

$sFile = FileOpen(@DesktopDir & "\Test.txt", 1)

For $i = 1 To 10000
    FileWriteLine($sFile, "Line " & $i)
Next

FileClose($sFile)

[Alexxander]

 

A good lesson to learn indeed. One of my first scripts saved a reg hive and then parsed through it. You don't notice the extreme difference until you test out something like this:

11 seconds

For $i = 1 To 10000
    FileWriteLine(@DesktopDir & "\Test.txt", "Line " & $i)
Next

Vs. this:

.767 seconds

$sFile = FileOpen(@DesktopDir & "\Test.txt", 1)

For $i = 1 To 10000
    FileWriteLine($sFile, "Line " & $i)
Next

FileClose($sFile)

yes awesome example 

the first one 3.6 sec

the second one 0.4 sec