Hi! I have some functions in a loop that get called a huge number of times. Some of them have two different forms, one when my elements are triangles and on when they are quads. Normally, I’d write two different for loops, check if I have quads or tris before entering the for loop, and then call th…

This depends on what your data is. If you are dealing with something like a Vector{Quad} or Vector{Tri}, than multiple dispatch is zero cost. If you have a Vector{Union{Tri,Quad}}, then Julia will probably just put an if statement in. If you have a Vector{Shape} (where Quad, Tri are subtypes of shap…

[image] Oscar_Smith: ch is zero cost. If you have a Vector{Union{Tri,Quad}} , then Julia will probably just put an if statement in. If you have a Vector{Shape} (where Quad , Tri are subtypes of shape), then multiple d I see. Makes sense. My vector is either all quads or all tris, so Julia is …

To be clear this is not multiple dispatch problems. It is also a problem for single dispatch. Its a dynamic dispatch vs static dispatch problem. Does it need to resolve the dispatch are runtime, or can it work it out at compile time. This is incontrast to some other languages with multiple dispa…

[image] oxinabox: It is also a problem for single dispatch. Its a dynamic dispatch vs static dispatch problem. That being said, the costs of dynamic dispatch might be higher for multiple dispatch, since single dispatch can use vtables . Fortunately, Julia was designed from the beginning to …

Any performance issues with multiple dispatch?

New to Julia

lmiq February 17, 2021, 5:18pm 6

You will reach a performance penalty if the number of types increase, which can be dealt with manual splitting. There are some threads discussing that, and solutions, for example:

Topic		Replies	Views
Article about Multiple Dispatch Community multidispatch	7	2067	August 12, 2022
If mutiple dispatch is done at compile time, wouldn't that make things faster? Performance multidispatch	3	542	May 23, 2022
Ask for advise : Multiple dispatch vs branching performance General Usage question , multiple-dispatch	7	393	January 14, 2025
Speed of multiple dispatch Performance	14	1300	November 27, 2023
Efficiency of Multiple Dispatch Performance question	3	246	November 10, 2024

Any performance issues with multiple dispatch?

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