All Questions
Tagged with performance list
1,057
questions
7
votes
2
answers
116
views
Do Python coders have a bias towards list over tuple? [closed]
Basic Facts
Lists are mutable (supporting inserts, appending etc.), Tuples are not
Tuples are more memory efficient, and faster to iterate over
So it would seem their use-cases are clear. ...
- 1,550
0
votes
1
answer
89
views
How to make this Python function even faster, lists processing
I was doing a Hackerrank question (I already finished that test, I am just asking because I am curious).
Most of test cases were successful but a few said that it took too long, so I had to optimize ...
- 19
0
votes
0
answers
46
views
Why Python multithreading is not speeding things up? [duplicate]
#from concurrent.futures import ProcessPoolExecutor
from concurrent.futures import ThreadPoolExecutor
import time
values = range(1,9999)
def dissect1(qq):
adding = sum(list1[qq:qq+100000])
...
- 57
2
votes
2
answers
113
views
element-wise add / subtract / multiply / divide operation in two lists in C#
Considering element-wise add / subtract / multiply / divide operation in two lists. I have the code as follows.
public class Calculate
{
public static IEnumerable<T> Add<T>(IEnumerable&...
- 489
0
votes
1
answer
89
views
performance of getting a new list with an additional value
To get a new list from a list with an additional value, I used to think that list_b = [*list_a, value] is more performant than list_b = list_a + [value], as the latter generates an intermediate [value]...
- 2,270
6
votes
3
answers
238
views
How to find the path of an element in a nested list
How can I find the path of an element in a nested list without manually digging through a list in a View?
Here is an example that I can already deal with:
l1 <- list(x = list(a = "no_match&...
- 12.3k
1
vote
1
answer
119
views
Efficient list sorting: Using heap instead of standard sorting is slower
I'm trying to create a more efficient way to sort lists and dictionaries in python and came across Efficient data structure keeping objects sorted on multiple keys. There the suggested solution was to ...
-1
votes
2
answers
54
views
Compare List of objects in java script
I want to create a function to compare a list of objects in the fast way
for (let i = 0; i < posts.length - 1; i++) {
for (let j = i + 1; j < posts.length; j++) {
const post1 = posts[i];
...
4
votes
4
answers
253
views
Which is more efficient in python (and in general): iterate over short list and searching in the longer one, or vice versa?
I have two lists, both contain integers represented as strings. large_list is large, up to low 10s of thousands of elements. small_list is smaller, up to hundreds of elements. I am filtering the ...
- 318
2
votes
0
answers
117
views
How do I find my memory leaky lists in flutter?
I used the Flutter Dev Tool Memory view to look for some issues in my performance.
To me it looks like I am having some issues with my lists.
The total size and the instances keep rising when doing ...
2
votes
3
answers
125
views
Most efficient way to check if sublist is present in list, ignoring the last element
I have a list that's structured like this:
[
[1, 2, 'A'],
[3, 4, 'B'],
[5, 6, 'C'],
...
]
I want to check if there exists a list inside this list, such that the first two elements are ...
- 95
1
vote
1
answer
65
views
Looking for help to decrease runtime of my code in Python
The overall goal of the code is the following:
The main list has x,y,z coordinates. I want to group rows together in which each x,y, and z coordinate is not more than +/-5 from eachother ("margin&...
- 11
2
votes
2
answers
2k
views
How to optimize the rendering of a large list of items in React?
I have a React component that renders a large list of items (about 1000) using the map method. Each item is a complex component that has its own state and props, and can be updated by the user. The ...
- 439
0
votes
1
answer
110
views
Summing the boolean attributes of a list of objects in Python
I have a list of python objects which have a boolean attribute. I wish to sum these booleans (i.e. count how many are true) in a relatively performant way. My test script looks something like:
import ...
0
votes
2
answers
99
views
Performance Issue with List<byte>
I have a file (~30MB) which I read with File.ReadAllBytes()
This File has a lot of structed data with different length (no terminator in between). So I have to check the length of the first data, cut ...
- 326