While True ... WEnd with ClipGet() and ClipPut() -> Bad CPU Usage

[Isaak]

Hi guys,

i've created an endless running script (intended) that modify the "new" clipboard with a string if the "old" clipboard contains a special string. The script should always run if my windows is running (therefore the while true infinite loop).

Here it is:

While True
   Exchange()
WEnd

Func Exchange()
   $clipboard = ClipGet()
   If ( StringLen($clipboard) >= 15 And StringLen($clipboard) <= 30 ) And ( StringLeft($clipboard, 4) = "1989" Or StringLeft($clipboard, 4) = "1990" ) Then
      ClipPut("Surprise, Surprise :)")
   Endif
EndFunc

But if I run the compiled exe, the CPU usage is extremly high (~50%) compared with other running big applications.

How can I reduce the cpu footprint without change the functionality of my script?

Maybe Sleep()?

I'm a starter with autoit, so please don't be too hard with me

[jguinch]

Add a sleep in your main loop :

While True
   Exchange()
  Sleep(10)
WEnd

[Isaak]

But how much delay in sleep() is enough to ensure that every STRG+C in clipboard is checked with my script?

sleep(1) wouldn't make sense (1 millisecond -> no cpu effect) and with sleep(1000) or sleep(5000) there would be a better cpu usage but the risk, that clipput() don't work immediately.

[JLogan3o13]

So try 100 ms. as suggested, and bump up by another 100 until you're comfortable.

Edited October 29, 2014 by JLogan3o13

[Melba23]

Isaak,

 

Sleep(1) wouldn't make sense (1 millisecond -> no cpu effect)

As it explains in the Help file:

 

Due to internal implementation, the sleep time completion is checked every 10 millisseconds so the precision cannot be less than 10

M23

.

[Isaak]

Ok thanks and which solution is better, that from jguinch or Exit? Where is the difference?

[MikahS]

Your preference! There is no difference

Edited October 29, 2014 by MikahS