https://juliagpu.gitlab.io/CUDA.jl/usage/workflow/
在CUDA.jl的网站里说,对CuArray标量索引时会非常慢,
那么我该怎么单独改变CuArray中的某一个数值?
julia> a = CuArray([1])
1-element CuArray{Int64,1,Nothing}:
1
julia> a[1] += 1
┌ Warning: Performing scalar operations on GPU arrays: This is very slow, consider disallowing these operations with `allowscalar(false)`
└ @ GPUArrays GPUArrays/src/indexing.jl:16
2