如何测量 Julia 的 RAM 消耗和计算时间？

Question

I'm developing different discretization schemes and in order to find out wich is the most effiecient one I would like to determine the maximun RAM comsuption and the time that takes to do an specifyc task, such as solving a system of equations, overwritting a matrix or writting the data to a file.

Is there any kind of code or something for doing what I need? I'm using Julia in Ubuntu by the way, but I could do it in Windows as well.

Thanks a lot

Answer 1

I love using the built-in @time for this kind of thing. See "Measure performance with @time and pay attention to memory allocation" . Example:

julia> @time myAwesomeFunction(tmp);
  1.293542 seconds (22.08 M allocations: 893.866 MiB, 6.62% gc time)

This prints out time, the number of memory allocations, the size of memory allocations, and the percent time spent garbage collecting ("gc"). Always run this at least twice —the first run will be dominated by compile times!

Also consider BenchmarkTools.jl . This will run the code multiple times, with some cool variable interpolation tricks, and give you better runtime/memory estimates:

julia> using BenchmarkTools, Compat

julia> @btime myAwesomeFunction($tmp);
  1.311 s (22080097 allocations: 893.87 MiB)

(My other favorite performance-related thing is the @code_* family of functions like @code_warntype .)

Answer 2

I think that BenchmarkTools.jl measures total memory use, not peak. I haven't found pure Julia code to measure this, but perhaps this thread is relevant.