# Allow\_concurrency

**URL:** <https://www.ruby-forum.com/t/allow-concurrency/126957>\
**Category:** Rails\
**Created:** [January 23, 2008, 7:19pm UTC](https://www.ruby-forum.com/t/allow-concurrency/126957 "2008-01-23T19:19:49Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Nicholas\_W](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/f17d59/32.png) [@Nicholas\_W](https://www.ruby-forum.com/u/Nicholas_W)\
**Post date:** [January 23, 2008, 7:19pm UTC](https://www.ruby-forum.com/t/allow-concurrency/126957/1 "2008-01-23T19:19:49Z")

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I see that allow\_concurrency is set to false by default. What are the  
risks  
and what can I eventually gain by setting it to true in terms of  
application  
speed ?

TIA,  
ngw