Hi Malte, you and Richard are on the right trace - and I was blind :)
The time cruncher is not the repeat loop, but my "special" sorting routine. I
have a mixed alpha-numerical list. It is perhaps a little bit strange, but I
want the numbers to be sorted at the end of the list. "A-Z-1-9-10-99-100-x"
Because I didn't found a "build-in" function to realize this, that’s why I
created this "Tiemo-Sort" (xSortListe). Perhaps there is a much straight
forward way to do this. Because I never had performance issues with this I
completely forgot this handler, I think I have to rethink this special sort:
---------------------------------------
function xSortListe pListe
-------------------------------------
-- Sortierung einer einfachen Liste, Zahlen am Ende
local tZeile, tLine, tArt, tOben, tAlphaSort
sort lines of pListe numeric -- gesamte Liste numerisch sortieren, damit
stehen alle Alphazeilen vorne und numerische hinten, Zahlen in richtiger Folge.
put the number of lines of pListe into tOben
put "mixed" into tArt
if not isNumber(first char of line tOben of pListe) then -- Letztes Zeichen
ist ein Alpha, also ganze Liste Alpha
put "alpha" into tArt
else if isNumber(first char of line 1 of pListe) then -- Letztes Zeichen ist
Zahl und 1. Zeichen auch Zahl
put "numeric" into tArt
end if
switch tArt
case "alpha" -- reine Alphaliste einfach international sortieren
sort lines of pListe international
break
case "mixed" -- bei gemischter Alpha + Zahlenliste nur den Alphateil
international sortieren
put 1 into tZeile
repeat for each line tLine in pListe
if the first character of tLine is a number then -- erste Zeile,
die mit einer Zahl beginnt
exit repeat
end if
add 1 to tZeile
end repeat
put line 1 to (tZeile - 1) of pListe into tAlphaSort -- den Alpha-Teil
herausnehmen und international sortieren
sort lines of tAlphaSort international
put tAlphaSort into line 1 to (tZeile - 1) of pListe -- den Alphateil
wieder zurück in die Gesamtliste setzen.
break
-- rein numerische Liste ist am Anfang schon sortiert
end switch
return pListe
end xSortListe
-----Ursprüngliche Nachricht-----
Von: use-livecode [mailto:use-livecode-boun...@lists.runrev.com] Im Auftrag von
Malte Brill
Gesendet: Samstag, 30. Mai 2015 15:51
An: use-livecode@lists.runrev.com
Betreff: Re: AW: How do you handle the poor performance of LC 7?
Hey Tiemo,
what does the xSortListe function do? What is rather funny that my real life
problem childs are also revolving around a live search feature. It might well
be that your speed issues (as mine) are related to the sorting part (if you do
a sort). My approach is a little diffrent than yours, as I do have numeric keys
in the array (and as numeric keys are not in stable order in an array I have
(had) to sort those on each keystroke).
To be fair towards 7, I have refactored quite a bit of my own code over the
past weeks and now have scenarios where the performance impact is far less
dramatic than it used to be. I just got around to test this yesterday and now
see a speed loss of the 7 engine of 7 to 15% which is somewhat acceptable (not
good, but acceptable). I had to jump through quite some hoops to get there
though. The only upside is that stuff got significantly faster also in 6.7 so
my users would see a general performance boost regardless the engine. That is
something I can sell. This is speaking for my own software though. If I am in
control of the budget all it costs is my time to refactor existing stuff and
most of the times refactoring is my friend, as generally the code base gets
better. If I am on the other side of my programming life, namely coding for
other customers, it gets a lot harder to sell them on refactoring a couple of
100 stacks, just to get them to the same speed with the newer engine, without
(many) other benefits. ROI isn’t that appealing / existent for them there.
That said, I guess we need more real life things where the 7 and 8 engine is
slower to hand over to the team, so many thanks you sent your stacks. As Mark
said, the „laboratory“ benchmark tests do not appear to help as much as I would
have thought in the first place. On the other hand it is rather difficult to
send over complete projects if they require additional requisites (like a
Database, or even worse a complete server) to demonstrate the issues. I must
say the team has been most helpful there, so I really hope for the best.
Cheers,
Malte
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