Re: Need for speed

[ag0aep6g via Digitalmars-d-learn]

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.
[...]
```
    for (int number = 0; number < 100000; ++number)
    {
        auto rnd = Random(unpredictableSeed);
        auto n = uniform(0, 100, rnd);
        mylist ~= n;
    }
```
```
for _ in range(100000):
    mylist.append(random.randint(0,100))
```

In the D version, you're re-seeding the random number generator 
on every loop. That takes time. You're not doing that in the 
Python version.

Move `auto rnd = ...;` out of the loop, and you will get better 
times. Or just use the default generator with `uniform(0, 100)`.