Hi Experts ,I’m just start studing Julia. But I’m in truble. Berrow 2D turblence simulation code is that I translated from Matlab. But It is not working well, very slow and use a lot of memory so I couldn’t run 3D version. I would like to borrow your help. using FFTW using Printf using LinearAl…

It appears that your code is in global scope which is very slow. Put your performance critical code inside a function as recommended in the Performance tips section of the manual . Appart from that please format your code by putting it inside a code block ```julia code ```

[image] Oscar_Smith: integrated What can I do DifferentialEquations.jl? What is difference own rk4 and DifferentialEquations.jl rk4. If you know something about Navier-Stokes quation with DifferentialEquations.jl,Please teach me about them.

[image] Take1234: What is difference own rk4 and DifferentialEquations.jl rk4 the big difference is that by using a library it Will be a single line of code to switch to a good algorithm (e.g. tsit5). I don’t understand your first question.

How I can change script for speed up

General Usage

Oscar_Smith September 22, 2023, 12:28pm 3

don’t roll your own rk4. use an integrated from DifferentialEquations.jl

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How I can change script for speed up

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