Hi Arnaud, First of all, it seems we have reverse definition of Diacritical. To avoid confusion, let's use (*) to represent the operation.
I'm interested how you could count execution in "given time". In this time, we execute 100,000 times of position(*) in 14ms and Replace String(*) to replace 100,000 occurance of same length of replacement string in 16ms. In your test, you got 684 execution of position in 180 ticks (3 seconds). In my test, I got 100,000 execution of position in less than 1 tick. Even with replace string(*), it replaced 100,000 occurence of string of same length in 16ms (just under 1 tick which is 16.67ms). Due to high overhead of your testing code, it might compromise the result. OK. I have confessed that I tested only 13.6 (not 16) since I don't want to install 16 on my development machine. However, based on 4D, Replace String(*) in v16 perform as fast as v13.6 if the replacement string is of same length (very fast indeed - 100,000 replacement in 16ms). For replacement of string of longer length, v16 will do "pre-scan" number of occurance and create an appropriate block of memory for the result. It means, it should be taking a little more time than replacement string of same length. My test code in ES_Count C_LONGINT($0;$c;$start;$pos;$len) C_TEXT($1;$2;$source;$find) $c:=0 $source:=$1 $find:=$2 $len:=Length($find) $start:=1 If ((Length($source)>0) & ($len>0)) Repeat $pos:=Position($find;$source;$start;*) If ($pos>0) $start:=$pos+$len $c:=$c+1 End if Until ($pos=0) End if $0:=$c Alan Chan 4D iNug Technical <[email protected]> writes: >since v15R3, using 'Replace string' for count seems always faster to me than >'Position' - even if [compiled+strict comparison] it's quite the same. Could >be a detail, but instead of measuring time to loop $i times, I often prefer to >count how much >iterations are executed during a given time, it makes interpreted/compiled >switch easier. All results under are from compiled, all 32b versions except >v16 in 64b. ><https://screencast.com/t/9TXxsJUH8ooj> >The little v12 test base I've used is here: ><http://forums.4d.fr/Post//15925184/1/#15925185> ********************************************************************** 4D Internet Users Group (4D iNUG) FAQ: http://lists.4d.com/faqnug.html Archive: http://lists.4d.com/archives.html Options: http://lists.4d.com/mailman/options/4d_tech Unsub: mailto:[email protected] **********************************************************************
