[BUG] random.random_float64 is extremely slow

[ma-sadeghi]

Bug description

Generating one random number at a time in a for loop is extremely slow, almost 2 orders of magnitude slower than a numba-jitted equivalent.

Context: I tried to use a simple Monte Carlo approach to calculate Pi by generating two random numbers in a box one at a time and checking whether they are inside the inscribed circle.

Steps to reproduce

fn calc_pi(n: Int) -> Float64:
    """Computes pi using Monte Carlo method."""
    var j: Int = 0
    var x: Float64
    var y: Float64

    for i in range(n):
        x = random.random_float64()
        y = random.random_float64()
        if pow(x, 2) + pow(y, 2) <= 1.0:
            j += 1

    var pi: Float64 = 4.0 * j / n
    return pi

System information

- What OS did you do install Mojo on ? Ubuntu 22.04
- Provide version information for Mojo by pasting the output of `mojo -v` mojo 24.2.1 (58157dc0)
- Provide Modular CLI version by pasting the output of `modular -v` modular 0.7.2 (d0adc668)