Groups   36 of 99+      julia-users › how can i rewrite my code to make use of the parallel feature of julia? 2 posts by 2 authors      博陈    Jun 23   Below is part of my code, I wrote it with FFTW.set_num_threads   to get parallel fft calculation. However, the for loops  for eachindex  are just serial. Is it possible to rewrite the code in a parallel way? I don't know how to implement it with  parallel, SharedArray or the simple  spawn features. To me, the documentations is far from clear.   using JLD  function ground ϕ0::Array Complex Float64 ,2 , dx::Float64                 , dt::Float64       FFTW.set_num_threads CPU_CORES       ns   size  ϕ0, 1      x   get_x ns, dx      p   get_p ns, dx             FFT plan     p_fft!   plan_fft!  similar ϕ0 , flags FFTW.MEASURE        prop_x   Array  Float64, ns , ns      prop_p   similar  prop_x         inbounds for j in 1:ns          inbounds for i in 1:ns             prop_x i, j    exp  -get_potential x i , x j     dt   2               prop_p i, j    exp  - p i  2 + p j  2  2.0   dt           end     end      normϕ   √ sumabs2 ϕ0     dx     scale!  ϕ0, 1   normϕ        ϕ2   similar  ϕ0       Δϕ   Array Float64, 0      push! Δϕ, 1.0      nn   0     while Δϕ 1    1.e-15         for j in eachindex ϕ2              ϕ2 j    ϕ0 j    prop_x j          end          p_fft!   ϕ2         for j in eachindex ϕ2              ϕ2 j     prop_p j          end          p_fft! \ ϕ2         for j in eachindex ϕ2              ϕ2 j     prop_x j          end          normϕ   √ sumabs2 ϕ2     dx         scale!  ϕ2, 1   normϕ            nn +  1                  empty! Δϕ          push! Δϕ, maxabs  ϕ2 - ϕ0            ϕ0, ϕ2   ϕ2, ϕ0     end      save  data gs-jld ,  ϕ , ϕ0       ϕ0 end       Jeffrey Sarnoff    Jul 12   Here are a few answers to similar questions, after the docs -- that is a good place to start.  https:  groups.google.com forum  !searchin julia-users parallel julia-users fe1yZawvvi0 kjX-ZIJwpCAJ https:  groups.google.com forum  !searchin julia-users parallel julia-users vt2hS9h36a0 _rqJ0Uj_Wy8J https:  groups.google.com forum  !searchin julia-users parallel julia-users E8fGIiDwckc EGQ1-rDLAAAJ https:  groups.google.com forum  !searchin julia-users parallel julia-users r3ZLpHCpUKw 09R7p2jGCwAJ