@timed to plot the time and memory consumption

General Usage
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1

Hello,
I am new to Julia. I have implemented different type of functions ( Fib 1 , Fib2, … etc ) to calculate Fibonacci numbers in different ways. How can I Use the macro @timed to plot the time and memory consumption of the various functions?

2

Welcome to the Julia Discourse forum!

See the docstring of the macro (?@timed), which has an example.

Also, please quote your code, and provide an MWE if you need further help.

1 Like
3

Hello @A.U.M and welcome.
Tamas is saying that Julia has a built in help system.

There are three modes in the Julia REPL.
the normal julia> mode where you can type in and execute code
The pkg> mode where you can add and view package information

Press the ? character and you go into the help?> mode
You can then type @timed to get some help in the timed macro. Or you can get help on functions.
Give it a try!

4

Hey Amrusama! Welcome!

You can find this thread useful for getting the time How to save @time output in a file or variable? I’ll try to find something for the memory consumption. Maybe some hack over @time??

UPDATE: I guess that the second value of @timed is for the time and the third is for the memory. Since the first is for the result, you can collect all three in a row. NOT working example, this is only to explain myself,

julia> for i in 1:100
           rows[i] = (@timed i^2)[1:3]
       end

julia> plot(1:100, [rows[i][1] for i in 1:100]) # for the result of ^2

julia> plot(1:100, [rows[i][2] for i in 1:100]) # for the timing

julia> plot(1:100, [rows[i][3] for i in 1:100]) # for the memory

I guess that there are better options to do this.

5

Note that if you want to do any serious measuring you should consider using BenchmarkTools.jl, or at very least call every method you want to test a single time before measuring the time, to avoid counting the compilation time.

2 Likes
6

For example, these two functions
fib1(n::Integer)::BigInt = round(BigInt, ((1+sqrt(5))/2)^n / sqrt(5))

function fib2(n::Integer)::BigInt
if n <= 1
n
else
fib2(n-1) + fib2(n-2)
end
end

how can i plot the time and memory consumption of these two functions using micro @timed ?

7

For example, these two functions

fib1(n::Integer)::BigInt = round(BigInt, ((1+sqrt(5))/2)^n / sqrt(5))

function fib2(n::Integer)::BigInt
if n <= 1
n
else
fib2(n-1) + fib2(n-2)
end
end

how can i plot the time and memory consumption of these two functions using micro @timed ?