# Allocation and slow down when # of types involved increase (slower than C++ virtual methods)

**URL:** <https://discourse.julialang.org/t/allocation-and-slow-down-when-of-types-involved-increase-slower-than-c-virtual-methods/87656>\
**Category:** Performance\
**Tags:** question, hep\
**Created:** [September 22, 2022, 3:43pm UTC](https://discourse.julialang.org/t/allocation-and-slow-down-when-of-types-involved-increase-slower-than-c-virtual-methods/87656 "2022-09-22T15:43:34Z")\
**Posts on this page:** 1\
**Showing post:** 9

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**Author:** ![gbaraldi](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/gbaraldi/32/22101_2.png) [@gbaraldi](https://discourse.julialang.org/u/gbaraldi)\
**Post date:** [September 22, 2022, 4:49pm UTC](https://discourse.julialang.org/t/allocation-and-slow-down-when-of-types-involved-increase-slower-than-c-virtual-methods/87656/9 "2022-09-22T16:49:46Z")

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A sequence of if elses or using short circuit evaluation in place of a switch(I like this a lot) will lower to efficient structures (jump tables etc…) if LLVM thinks it will be faster.

See [Do C++ performance optimisations apply to Julia? - #30 by gbaraldi](https://discourse.julialang.org/t/do-c-performance-optimisations-apply-to-julia/82567/30)

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