# Huge performance drop using @spawn

**URL:** https://discourse.julialang.org/t/huge-performance-drop-using-spawn/33242
**Category:** General Usage
**Tags:** performance
**Created:** [January 11, 2020, 5:05pm UTC](https://discourse.julialang.org/t/huge-performance-drop-using-spawn/33242 "2020-01-11T17:05:35Z")
**Posts on this page:** 1
**Showing post:** 4

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### Author: ![cshen](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/cshen/32/217287_2.png) [@cshen](https://discourse.julialang.org/u/cshen)
#### Post date: [January 11, 2020, 5:27pm UTC](https://discourse.julialang.org/t/huge-performance-drop-using-spawn/33242/4 "2020-01-11T17:27:13Z")

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See also [this](https://discourse.julialang.org/t/simple-recursive-fibonaci-example-how-to-make-it-faster/32369/16) as it was already discussed in detail!

tl;dr start using spawn only with big enough ns.

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_[View the full topic](https://discourse.julialang.org/t/huge-performance-drop-using-spawn/33242)._