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Allocate memory for a component
Posted on 2010-11-27
First, im not sure if this is a generic question or not. I'm using DevArts component "tVitualTable" a table that exist only in memory. If i add 10 000 rows - it takes less than a second, but if i add 100 000 records, it takes about one minute. Im quite sure this has to do with memory allocation, but can i affect this?
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5 Comments
Active 4 days ago
The memory allocation is already done by the component itself and nothing is required from you to help it out.
How do you generate those records, it could be overhead.
Try to duplicate those 10 000 records on memory to make sure it's not memory allocation.
How do you generate those records, it could be overhead.
Try to duplicate those 10 000 records on memory to make sure it's not memory allocation.
I'm sure the problem is in your loop statement, try to trace each line you have while loading the table
Make sure you call DisableControls and EnableControls.
Dont use FieldByName if you are loading many records, use field index or get pointers to the fields first
procedure TForm1.LoadRecords;
var
F1: TField;
begin
F1 := VirtualTable.FieldByName('
VirtualTable.DisableConrol
for I := 0 to LoadCount do
begin
VirtualTable.Append;
FI.AsString := '';
//or
VirtualTable.Fields[0].AsS
VirtualTable.Post;
end;
VirtualTable.EnableControl
end;
Secondly,you dont have to load all the records at once, You can load 10,000 records at a time each time the user scrolls to the last record until you have loaded all records
Dont use FieldByName if you are loading many records, use field index or get pointers to the fields first
procedure TForm1.LoadRecords;
var
F1: TField;
begin
F1 := VirtualTable.FieldByName('
VirtualTable.DisableConrol
for I := 0 to LoadCount do
begin
VirtualTable.Append;
FI.AsString := '';
//or
VirtualTable.Fields[0].AsS
VirtualTable.Post;
end;
VirtualTable.EnableControl
end;
Secondly,you dont have to load all the records at once, You can load 10,000 records at a time each time the user scrolls to the last record until you have loaded all records
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