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Parallelization
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Parallelization

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is an option for Compile that specifies whether it should create a compiled function that could run in parallel.

Details

  • Parallelization applies to the execution of the compiled function.
  • Compiled functions only run in parallel if Listable is one of the RuntimeAttributes and the function threads over list arguments.
  • Compiled functions run in parallel using multiple threads of execution.
  • Typically, $ProcessorCount is used to determine how many threads are used.
  • If a compiled function running in parallel has several threads trying to call ordinary Wolfram Language code, only one thread can do this at any time.
  • The following settings can be used:
  • Truecreate parallel code
    Falsecreate single-thread code
    Automaticuse parallelization for optimal arguments

Examples

Basic Examples  (1)Summary of the most common use cases

Listable compiled functions can execute in parallel:

In[1]:=1
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https://wolfram.com/xid/0mk89pjw6rf2-hv8mo4
Out[1]=1

This shows the operation running sequentially:

In[2]:=2
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https://wolfram.com/xid/0mk89pjw6rf2-g974g6
Out[2]=2

Typically, $ProcessorCount is used to determine how many threads can be used:

In[3]:=3
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https://wolfram.com/xid/0mk89pjw6rf2-bo7f4z
Out[3]=3
Wolfram Research (2010), Parallelization, Wolfram Language function, https://reference.wolfram.com/language/ref/Parallelization.html.
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Wolfram Research (2010), Parallelization, Wolfram Language function, https://reference.wolfram.com/language/ref/Parallelization.html.

Text

Wolfram Research (2010), Parallelization, Wolfram Language function, https://reference.wolfram.com/language/ref/Parallelization.html.

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Wolfram Research (2010), Parallelization, Wolfram Language function, https://reference.wolfram.com/language/ref/Parallelization.html.

CMS

Wolfram Language. 2010. "Parallelization." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/Parallelization.html.

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Wolfram Language. 2010. "Parallelization." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/Parallelization.html.

APA

Wolfram Language. (2010). Parallelization. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/Parallelization.html

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Wolfram Language. (2010). Parallelization. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/Parallelization.html

BibTeX

@misc{reference.wolfram_2025_parallelization, author="Wolfram Research", title="{Parallelization}", year="2010", howpublished="\url{https://reference.wolfram.com/language/ref/Parallelization.html}", note=[Accessed: 04-June-2025 ]}

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@misc{reference.wolfram_2025_parallelization, author="Wolfram Research", title="{Parallelization}", year="2010", howpublished="\url{https://reference.wolfram.com/language/ref/Parallelization.html}", note=[Accessed: 04-June-2025 ]}

BibLaTeX

@online{reference.wolfram_2025_parallelization, organization={Wolfram Research}, title={Parallelization}, year={2010}, url={https://reference.wolfram.com/language/ref/Parallelization.html}, note=[Accessed: 04-June-2025 ]}

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@online{reference.wolfram_2025_parallelization, organization={Wolfram Research}, title={Parallelization}, year={2010}, url={https://reference.wolfram.com/language/ref/Parallelization.html}, note=[Accessed: 04-June-2025 ]}