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Delphi High Performance
book

Delphi High Performance

by Primož Gabrijelčič
February 2018
Intermediate to advanced content levelIntermediate to advanced
336 pages
7h 52m
English
Packt Publishing
Content preview from Delphi High Performance

Parallel for

The Parallel Programming Library implements only one pattern that I haven't talked about yet—Parallel for, a multithreaded version of a for loop. This pattern allows for very simple parallelization of loops, but this simplicity can also get you into trouble. When you use Parallel for, you should always be very careful that you don't run into some data sharing trap.

For comparison reasons, the ParallelFor demo implements a normal for loop (shown as follows), which goes from 2 to 10 million, counts all prime numbers in that range, and logs the result:

const  CHighestNumber = 10000000;procedure TbtnParallelFor.btnForClick(Sender: TObject);var  count: Integer;  i: Integer;  sw: TStopwatch;begin  sw := TStopwatch.StartNew; count := 0; ...
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Publisher Resources

ISBN: 9781788625456Supplemental Content