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whatever

•Created by xentropy on 8/27/2024 in #questions

mojo-lsp-server crashing

Hi, I experiment also on a m1 Mac with the newest official (not nightly) reales and get the crashing notice when using the vsc pluging for mojo. My script is still running normally just noticed the memory consumption of the lsp is sometimes 20mb sometimes over 100mb and was wondering why. Is this related to the crashing?

36 replies

MModular

•Created by whatever on 12/26/2024 in #questions

List memory preallocation

Thanks

5 replies

MModular

•Created by whatever on 11/20/2024 in #questions

How are Integers implemented in Mojo?

I find out that python only stores a single int object and has references on this in the list, if you use it several time.

a = [100000000 for _ in range(100)]
print(all(a[0] is x for x in a))

a = [100000000 for _ in range(100)]
print(all(a[0] is x for x in a))

` But I dont found a sorce explaining it yet

12 replies

MModular

•Created by whatever on 11/20/2024 in #questions

How are Integers implemented in Mojo?

Can you send me a link to the mojo list implementation? I read that python uses interning, if the same value is used. So it only creates it once and than uses references to that. However I did not find a good explanation yet. Most say for integers its just in the range of -5 till 256, but this is not true. I meassure the same memory consumption regardless of using 1 as integer value or 1000000. Seems like Cpython uses interning also for higher integer values

12 replies

MModular

•Created by whatever on 11/20/2024 in #questions

How are Integers implemented in Mojo?

If I modify it and append i (from 0 to 99 999 999) to the list, instead of each time 1. Mojo still uses 1.8gb, but python 3.12 uses 3,2gb

12 replies

MModular

•Created by whatever on 11/20/2024 in #questions

How are Integers implemented in Mojo?

Thanks for your reply. Maybe Oftopic here: Why experimenting with python and mojo integer lists i noticed that, the memory consumption I measure with top is not the same each run in Python.

from time import sleep

def test_large_list(size):
    # Create a large list
    large_list = [1 for _ in range(size)]
    sleep(10)
    return large_list

if __name__ == '__main__':
    # Measure memory usage
    size = 100_000_000  
    list = test_large_list(size)
    print(list[10])

from time import sleep

def test_large_list(size):
    # Create a large list
    large_list = [1 for _ in range(size)]
    sleep(10)
    return large_list

if __name__ == '__main__':
    # Measure memory usage
    size = 100_000_000  
    list = test_large_list(size)
    print(list[10])

` If I run it top shows me memory consumptions between 150 and 800 mb. The consumption of this mojo process is always arround 1800mb

from time import sleep

fn test_large_list(size: Int) -> List[Int]:
    var large_list = List[Int](size)  
    for _ in range(size):
        large_list.append(1)
    return large_list

fn main():
    var size: Int = 100_000_000  
    var large_list = test_large_list(size)
    print("List created successfully")

    sleep(15)
    print(large_list[10])

from time import sleep

fn test_large_list(size: Int) -> List[Int]:
    var large_list = List[Int](size)  
    for _ in range(size):
        large_list.append(1)
    return large_list

fn main():
    var size: Int = 100_000_000  
    var large_list = test_large_list(size)
    print("List created successfully")

    sleep(15)
    print(large_list[10])

` Why is the memory consumption of my python process that not always the same? Also why is python here that much more efficent?

12 replies

MModular