Are there any tools in julia that can test the peak memory consumption of the functions I wrote?

General Usage Performance
,
1

Let’s look at this example first:

julia> using BenchmarkTools

julia> 

julia> function f(x::Matrix{Float64})
           y = x * x
           return nothing
       end
f (generic function with 1 method)

julia> 

julia> a = rand(4,4)
4×4 Matrix{Float64}:
 0.267034  0.604533  0.810068  0.0177578
 0.498969  0.358759  0.515774  0.246705
 0.791061  0.493207  0.843597  0.0925471
 0.706005  0.702466  0.414509  0.150272

julia> 

julia> @btime begin
           f(a)
       end
  156.121 ns (1 allocation: 192 bytes)

julia> 

julia> @btime begin
           f(a)
           f(a)
       end
  310.246 ns (2 allocations: 384 bytes)

julia> 

julia> @btime begin
           f(a)
           f(a)
           f(a)
       end
  465.306 ns (3 allocations: 576 bytes)

For the last one, its peak memory consumption should equal 192 bytes, not triple. I don’t know if my example is appropriate, but I think you get the idea, I want to know if there’s a function that can gives the peak memory consumption.

julia> @time begin
           f(a)
           f(a)
           f(a)
       end
  0.000008 seconds (3 allocations: 576 bytes)

julia> @allocated begin
           f(a)
           f(a)
           f(a)
       end
576

Neither can these two.

2

What is the use of memory estimation given by @time, @btime, @allocated?
Shouldn’t we be concerned about peak memory consumption? Because it determines whether we can run on a machine with a maximum amount of memory.