Re: Why is my code so slow

Subject: Re: Why is my code so slow
From: Christopher Stone <email@hidden>
Date: Sat, 29 Nov 2014 00:06:42 -0600

On Nov 28, 2014, at 21:57, David Crowe <email@hidden> wrote:

The following code is incredibly slow if the text string I give it starts with more than 4 or 5 blanks. By the time I'm skipping over 12 blanks, it is taking a second to execute.

Any ideas why? And is there an easier (and faster) way to trim blanks and tabs off a text string?

______________________________________________________________________

Hey David,

Which OSX are you using? Yosemite?

On my system (10.9.5) your script is quite fast.

If I was going for vanilla AppleScript I'd be more likely to do something like this:

-------------------------------------------------------------------------------------------

on stripLeadingWhitespace(_str)

set stripCharList to {space, tab}

set {oldTIDS, AppleScript's text item delimiters} to {AppleScript's text item delimiters, ""}

considering case

repeat with i in (get text items of _str)

if i is not in stripCharList then

set AppleScript's text item delimiters to (contents of i)

set _str to i & (text items 2 thru -1 of _str) as text

exit repeat

end if

end repeat

end considering

set AppleScript's text item delimiters to oldTIDS

return _str

end stripLeadingWhitespace

set _str to "		            		What are you looking for?  Speed?"

set _str to stripLeadingWhitespace(_str)

-------------------------------------------------------------------------------------------

However. I much prefer to do text processing with the Satimage.osax and regular expressions:

-------------------------------------------------------------------------------------------

set _str to " What are you looking for? Speed?"

set _str to change "^[[:blank:]]+" into "" in _str with regexp

-------------------------------------------------------------------------------------------

Best Regards,

Chris

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