Why is PLINQ slower?

Asked Oct 11 '11 at 01:07

Active Oct 11 '11 at 01:07

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Possible Duplicate:
PLINQ Performs Worse Than Usual LINQ

Does anyone know why this PLINQ code is slower than regular LINQ? Is there anyway to fix it?

// dic is a Dictionary<int, int>
var location = (from locations in dic.AsParallel
                             orderby locations.Value descending
                             select locations.Key).First();
return location;

Adding the ParallelQuery slows things down a lot by why would that be the case?

edited May 23 '17 at 12:27

Community

asked Oct 11 '11 at 01:07

user385048

2

Parallelization isn't free. How many pairs are in the dictionary? – Anthony Pegram Oct 11 '11 at 01:10
1

See: [PLINQ Performs Worse Than Usual LINQ](http://stackoverflow.com/questions/3354518/plinq-performs-worse-than-usual-linq) – Anthony Pegram Oct 11 '11 at 01:12
@user385048: Read the analogy about brick laying vs wall building in Anthony's link. – Ilian Oct 11 '11 at 02:09

Why is PLINQ slower?

0 Answers0