[REBOL] Re: Fast way to strip characters
From: pwawood:gma:il at: 7-Oct-2009 16:00
> Peter
>
> Trim modifies the string in situ.
>
> Your trim code only does it once but parse is working 10,000 x.
Oops, I forgot about Rebol's side effects for a moment. However the
trim code did it 10,000 times but didn't have so much to do 9999 of
them.
This is a better test and still indicates trim is faster for this
example:
speedtest: func [][
st: now/precise
loop 10000 [
teststring: copy "I'm so not here"
stripped: trim/with teststring "' "
]
et: now/precise
print ["10000 trim/with took:" difference et st]
st: now/precise
strip: charset [#" " #"'"]
not-strip: complement strip
loop 10000 [
teststring: copy "I'm so not here"
stripped: copy ""
parse teststring [any [copy str some not-strip (insert tail
stripped str)| some strip]]
]
et: now/precise
print ["10000 parse took:" difference et st]
]
>> speedtest
10000 trim/with took: 0:00:00.013725
10000 parse took: 0:00:00.073276
Regards
Peter
