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PODelphi 2010: No thread vs threads - TSQLConnection and TSQLDataSet
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2010-09-07T04:24:26.053
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<a href="https://stackoverflow.com/questions/3632945/delphi-2010-no-thread-vs-threads">My previous question</a> From the above answer, means if in my threads has create objects, i will face the memory allocations/deallocations bottleneck? I've a case that I need to create TSQLConnection and TSQLDataSet to query data from 5 tables of the database, each table has more than 10000 records. So I will create 5 threads, each thread accept a tablename as parameter via constructor. Unfortunately, i cannot get more obvious difference of time taken. I've write the following codes: <pre><code> TMyThread = class(TThread) private FTableName: string; protected procedure Execute; override; public constructor Create(const CreateSuspended: Boolean; const aTableName: string); reintroduce; overload; end; constructor TMyThread.Create(const CreateSuspended: Boolean; const aTableName); begin inherited Create(CreateSuspended); FTableName := aTableName; FreeOnTerminate := True; end; procedure TMyThread.Execute; var C: TSQLConnection; D: TDataSet; begin C := NewSQLConnection; try D := NewSQLDataSet(C, FTableName); try D.Open; while not D.Eof do begin // Do something D.Next; end; finally D.Free; end; finally C.Free; end; end; function NewSQLConnection: TSQLConnection; begin Result := TSQLConnection.Create(nil); // Setup TSQLConnection end; function NewSQLDataSet(const aConn: TSQLConnection; const aTableName: string): TSQLDataSet; begin Result := TSQLDataSet.Create(aConn); Result.CommandText := Format('SELECT * FROM %s', [aTableName]); Result.SQLConnection := aConn; end; </code></pre> Is there any advice or recommendation for this case? 
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<multithreading><delphi>
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Delphi 2010: No thread vs threads - TSQLConnection and TSQLDataSet
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