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ParallelMap

ParallelMap[f, expr]
applies f in parallel to each element on the first level in expr.
ParallelMap[f, expr, levelspec]
applies f in parallel to parts of expr specified by levelspec.
  • ParallelMap is a parallel version of Map, which automatically distributes different applications of f among different kernels and processors.
  • ParallelMap will give the same results as Map, except for side effects during the computation.
  • ParallelMap uses the same level specifications as Map. Not all level specifications can be parallelized.
  • If an instance of ParallelMap cannot be parallelized it is evaluated using Map.
EXAMPLESCLOSE ALL
Basic Examples   (3)
Use explicit pure functions:
Functions used need to be distributed first:
In[1]:=
Click for copyable input
Out[1]=
 
Use explicit pure functions:
In[1]:=
Click for copyable input
Out[1]=
 
Functions used need to be distributed first:
In[1]:=
Click for copyable input
In[2]:=
Click for copyable input
In[3]:=
Click for copyable input
Out[3]=
Possible Issues   (1)
If a level specification prevents parallization, ParallelMap evaluates like Map:
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