On 13/10/2015 02:20, Mike Doub wrote:
Pass by reference and you can eliminate a memcopy on the initial function call.
-= Mike
That *used* to be true - but (unless my memory is playing tricks again
:-), Mark Waddingham said on the list recently that recent (*) versions
of LC use a pointer, and only "copy-on-write" - so there would be no
saving in this case.
Kind of verified by a very simple benchmark:
using a value of 500,000 I got times of
LC version normal pass by ref
6.6 4023 683
7.0.5 1655 1486
8.0 1768 1465
The code used (with apologies - a bit rushed)
constant K = 100
constant KK = 10
on mouseUp
ask "how often"
put it into KKK
repeat K times
put "a" after tmp
end repeat
repeat KK times
put tmp after tmp
end repeat
put the number of chars in tmp
put the millisecs into t1
repeat KKK times
aa tmp
end repeat
put " took " & the millisecs - t1 after msg
put the millisecs into t1
repeat KKK times
bb tmp
end repeat
put " took " & the millisecs - t1 after msg
end mouseUp
on aa p
put char 1 of p into t
end aa
on bb @p
put char 1 of p into t
end bb
-- Alex.
On 13/10/2015 02:20, Mike Doub wrote:
Pass by reference and you can eliminate a memcopy on the initial function call.
-= Mike
On Oct 12, 2015, 9:11 PM, at 9:11 PM, Geoff Canyon <gcan...@gmail.com> wrote:
Not quite as concise, but this function is about 3x faster:
function greatestLessThan pList,V
put empty into R
repeat for each item i in pList
if i < V and i > R then put i into R
end repeat
return R
end greatestLessThan
_______________________________________________
use-livecode mailing list
use-livecode@lists.runrev.com
Please visit this url to subscribe, unsubscribe and manage your
subscription preferences:
http://lists.runrev.com/mailman/listinfo/use-livecode
_______________________________________________
use-livecode mailing list
use-livecode@lists.runrev.com
Please visit this url to subscribe, unsubscribe and manage your subscription
preferences:
http://lists.runrev.com/mailman/listinfo/use-livecode
_______________________________________________
use-livecode mailing list
use-livecode@lists.runrev.com
Please visit this url to subscribe, unsubscribe and manage your subscription
preferences:
http://lists.runrev.com/mailman/listinfo/use-livecode
