Need for speed

[Imperatorn]

On Thursday, 1 April 2021 at 17:30:15 UTC, Chris Piker wrote:
> On Thursday, 1 April 2021 at 16:52:17 UTC, Nestor wrote:
>> I was hoping to beat my dear Python and get similar results to 
>> Go, but that is not the case neither using rdmd nor running 
>> the executable generated by dmd. I am getting values between 
>> 350-380 ms, and 81ms in Python.
>
> Nice test.  I'm new to D as well and can't comment on needed 
> refactoring.   To confirm your results I compiled the D example 
> using:
>
> ```
> gdc -O2 speed.d -o speed
> ```
>
> and measured 129 ms for the D program and 63 ms for the python3 
> equivalent.
>
> I'll be keen to see how this plays out since I'm using D as a 
> faster alternative to python.

I have made 4 variants of the code and get:
20 ms (mylist ~= n and mylist.sort)
8 ms (mylist[number] = n and concurrent sort)
10 ms (parallel assignment and mylist.sort)
5 ms (parallel assignment and concurrent.sort)

Also make sure you build your application in release mode, this 
made quite some difference.