# Performance core principles: 1. Unstored calculations

**URL:** <https://the.fmsoup.org/t/performance-core-principles-1-unstored-calculations/1857>\
**Category:** NickLightbody's\
**Created:** [March 10, 2021, 1:06am UTC](https://the.fmsoup.org/t/performance-core-principles-1-unstored-calculations/1857 "2021-03-10T01:06:25Z")\
**Posts on this page:** 2\
**Page:** 3

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**Author:** ![Malcolm](https://yyz2.discourse-cdn.com/flex030/user_avatar/the.fmsoup.org/malcolm/32/196_2.png) [@Malcolm](https://the.fmsoup.org/u/Malcolm)\
**Post date:** [March 20, 2021, 2:26am UTC](https://the.fmsoup.org/t/performance-core-principles-1-unstored-calculations/1857/43 "2021-03-20T02:26:21Z")

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> [@nicklightbody](#):
>
> I wonder whether there is any performance difference between $$var & $var arrays run server side?

I would be interested to know. There has to be some difference in the way that they are handled but whether that translates into a performance difference is uncertain.

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**Author:** ![nicklightbody](https://yyz2.discourse-cdn.com/flex030/user_avatar/the.fmsoup.org/nicklightbody/32/1267_2.png) [@nicklightbody](https://the.fmsoup.org/u/nicklightbody)\
**Post date:** [April 22, 2021, 8:30am UTC](https://the.fmsoup.org/t/performance-core-principles-1-unstored-calculations/1857/44 "2021-04-22T08:30:59Z")

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Sorry - haven’t found time to try this next step yet @Malcolm  
Nick

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