Hi,
I am working on embedded arm linux.I am trying to extract records form a
local database of sqlite using QT Application. My local database is of size
2.6MB and contains almost 1.2 lakh records , each record has three fields (ID,
name, address). I am trying to extract all the records from database and store
it in a single QByteArray (equivalent to char array ) variable. But the
extraction procedure is very slow. It took me 3 hours to extract the entire
data (on ARM9 device with 200MHz clock). While the same code on a Intel Core 2
duo 2.93GHz PC with linux took less than two minutes for the entire
extraction. On the ARM device, I use NAND flash as the storage medium and
yaffs2 as the file system. The code segment is given below: QString
str="select * from table_user20"; query_model.setQuery(str); i=0;
while(query_model.record(i).value("Id").toByteArray()!="") {
data+=query_model.record(i).value("Id").toByteArray();
data=data+unit_sp; data
+=query_model.record(i).value("Name").toByteArray(); data=data+unit_sp;
data +=query_model.record(i).value("Address").toByteArray(); data
+=record_sp; i++; }Is the system supposed to take this amount of
time on a ARM base embedded device ? Is there any better way to extract data
?
With RegardsGIGIN
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