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PeekS() vs Left()
Posted: Thu Oct 12, 2006 8:08 am
by Joakim Christiansen
Both very fast, but PeekS() is faster!
Maybe it should be noted in the helpfile?
Code: Select all
Test.s = "Hello you damn bitch!!"
New.s
For u=0 To 10
Time = ElapsedMilliseconds()
For i=0 To 999999
New = PeekS(@Test,10)
Next
Debug "PeekS() delay: "+Str(ElapsedMilliseconds()-Time)
Time = ElapsedMilliseconds()
For i=0 To 999999
New = Left(Test,10)
Next
Debug "Left() delay: "+Str(ElapsedMilliseconds()-Time)
Next
Any other commands we should test?
Posted: Thu Oct 12, 2006 8:18 am
by CadeX
Interesting... *Quickly modifies all of his programs code*, Like...Yeah...Everyone knew....uh...that! Yeah!
Lol, thanks for pointing that out... I guess it does make left kinda useless.
Posted: Thu Oct 12, 2006 8:19 am
by Joakim Christiansen
Hehe, yeah it does.
It's not very much faster but a little, and I love speed!
Re: PeekS() vs Left()
Posted: Thu Oct 12, 2006 8:20 am
by traumatic
...never ever do any performance tests with enabled debugger...
Re: PeekS() vs Left()
Posted: Thu Oct 12, 2006 8:20 am
by Joakim Christiansen
traumatic wrote:...never ever do any performance tests with enabled debugger...
Oh, I forgot about that.
Hmm, let's see how it's without it then... *testing again*
Posted: Thu Oct 12, 2006 8:23 am
by Joakim Christiansen
Disable debugger for real test.
Code: Select all
Test.s = "Hello you damn bitch!!"
New.s
String.s
For u=0 To 10
Time = ElapsedMilliseconds()
For i=0 To 999999
New = PeekS(@Test,10)
Next
String + "PeekS() delay: "+Str(ElapsedMilliseconds()-Time) + #CRLF$
Time = ElapsedMilliseconds()
For i=0 To 999999
New = Left(Test,10)
Next
String + "Left() delay: "+Str(ElapsedMilliseconds()-Time) + #CRLF$
Next
MessageRequester("Result",String)
Still faster!
Posted: Thu Oct 12, 2006 8:24 am
by thamarok
Disable debugger and see the results:
Code: Select all
Test.s = "Hello you damn bitch!!"
New.s
For u=0 To 5
Time = ElapsedMilliseconds()
For i=0 To 999999
New = PeekS(@Test,10)
Next
MessageRequester("","PeekS() delay: "+Str(ElapsedMilliseconds()-Time) )
Time = ElapsedMilliseconds()
For i=0 To 999999
New = Left(Test,10)
Next
MessageRequester("","Left() delay: "+Str(ElapsedMilliseconds()-Time) )
Next
PeekS seems just very little faster....
Posted: Thu Oct 12, 2006 11:21 am
by remi_meier
And now we read the manual a bit more carefully.....
Left() is safe even with invalid length, like negative ones :roll:
Edit: And btw, how would you do things like Left(Trim(s.s)) with PeekS()?
Posted: Thu Oct 12, 2006 12:45 pm
by GedB
Don't forget that unicode support means that you cannot assume that 1byte = 1 character.