On 11/6/10 8:30 AM, Peter Haworth wrote:
I just built my first standalone with LiveCode 4.5 (on OSX) and I'm
seeing painfully slow performance compared to the same application
built with 4.0.
I'm using an SQLite database to populate all the data on the cards in
the app, not sure if there's some problem with the SQLite side of
things. Only other thing I can think of is that I am using several
front scripts. Opening a card used to be almost instantaneous, now
it's taking 30-45 seconds. Bringing up the data for a different
SQLite row used to be instantaneous, now takes 10 seconds or so. This
is consistant across all the cards that handle data fro any table in
my SQLite database.
The 4.0 standalone still works just fine using the same database.
Any ideas?
Pete Haworth
Disclaimer: this may having nothing to do with your issue and does not
explain why it was fast before... but still good to remember:
Are you feeding the data to the fields row, by row, or do you get all
your data into a variable and then post it to the field after the query
is complete?
this is construct from a sample stack made available in 2006:
if recNum > 0 then
repeat recNum times
put empty into tRec
repeat with c = 1 to colNum
-- put revDatabaseColumnNamed(curID, line c of colNames) & tab
after tRec
put revDatabaseColumnNumbered(curID, c) & tab after tRec
end repeat
put tRec & cr after fld "Select"
-- revMoveToPreviousRecord curID
revMoveToNextRecord curID
if the result = false then exit repeat
end repeat
end if
this was painfully slow!
when I replaced this line:
put tRec & cr after fld "select"
with
put tRec & cr after tResultSet
end repeat
end if
put tResultSet into fld "select"
the whole thing went from "painfully slow" to "nearly instantaneous"
and I have confirmed this many times: updating a field, line by line is
hard, for example if your results comprise 650 found rows... because
(I'm guessing) you are forcing the stack to update itself 650 times...
whereas, if you poke a variable and *then* push it to the GUI you are
asking the stack to only update itself 1 time.
HTH
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