# Julia at Scale

**URL:** https://discourse.julialang.org/c/domain/parallel/34.md?page=16

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**Page:** 17

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## [How to query the current maximum number of threads?](https://discourse.julialang.org/t/how-to-query-the-current-maximum-number-of-threads/5342)

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**Author:** [@juliohm](https://discourse.julialang.org/u/juliohm)\
**Replies:** 8\
**Last updated:** [August 12, 2017, 2:31am UTC](https://discourse.julialang.org/t/how-to-query-the-current-maximum-number-of-threads/5342 "2017-08-12T02:31:48Z")

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I have just found JULIA\_NUM\_THREADS in the documentation, and I wonder if Julia is already doing a good job on picking up the number of CPU cores on my laptop. Is there a command to find the number of threads available?

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## [Persistent local data structures in parallel programs](https://discourse.julialang.org/t/persistent-local-data-structures-in-parallel-programs/5175)

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**Author:** [@michakraus](https://discourse.julialang.org/u/michakraus)\
**Replies:** 0\
**Last updated:** [August 2, 2017, 10:37am UTC](https://discourse.julialang.org/t/persistent-local-data-structures-in-parallel-programs/5175 "2017-08-02T10:37:48Z")

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I am trying to implement a parallel problem slightly more involved than a simple for loop. Namely, I am trying to implement a simple pseudo-spectral solver for an integro-differential equation which features a complicate…

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