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Reddit
reddit.com › r/python › big o cheat sheet: the time complexities of operations python's data structures
r/Python on Reddit: Big O Cheat Sheet: the time complexities of operations Python's data structures
April 16, 2024 -

I made a cheat sheet of all common operations on Python's many data structures. This include both the built-in data structures and all common standard library data structures.

The time complexities of different data structures in Python

If you're unfamiliar with time complexity and Big O notation, be sure to read the first section and the last two sections. I also recommend Ned Batchelder's talk/article that explains this topic more deeply.

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Python Morsels
pythonmorsels.com › time-complexities
Python Big O: the time complexities of different data structures in Python - Python Morsels
April 16, 2024 - This article is primarily meant to act as a Python time complexity cheat sheet for those who already understand what time complexity is and how the time complexity of an operation might affect your code.
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GeeksforGeeks
geeksforgeeks.org › python › complexity-cheat-sheet-for-python-operations
Complexity Cheat Sheet for Python Operations - GeeksforGeeks
July 12, 2025 - This cheat sheet is designed to help developers understand the average and worst-case complexities of common operations for these data structures that help them write optimized and efficient code in Python. Python's list is an ordered, mutable sequence, often implemented as a dynamic array. Below are the time ...
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GitHub
github.com › jaimin-bariya › python-complexity-cheatsheet
GitHub - jaimin-bariya/python-complexity-cheatsheet: A concise and comprehensive cheat sheet covering time complexities of Python's built-in data structures like Lists, Dictionaries, Sets, Tuples, and Strings. This resource is designed to help developers write efficient and optimized Python code. · GitHub
A concise and comprehensive cheat sheet covering time complexities of Python's built-in data structures like Lists, Dictionaries, Sets, Tuples, and Strings. This resource is designed to help developers write efficient and optimized Python code.
Author   jaimin-bariya
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Python
wiki.python.org › moin › TimeComplexity
TimeComplexity - Python Wiki
This page documents the time-complexity (aka "Big O" or "Big Oh") of various operations in current CPython. Other Python implementations (or older or still-under development versions of CPython) may have slightly different performance characteristics.
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GitHub
github.com › ultimatecoder › python-time-complexity-cheat-sheet
GitHub - ultimatecoder/python-time-complexity-cheat-sheet: Runtime of core Python functions
Remembering complexity of each built-in function of Python is difficult for me and I am sure it will be difficult for you too. This is a collection of runtime and space complexity that I have calculated by observing the latest source code of CPython. You can use this as a cheat sheet.
Author   ultimatecoder
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DEV Community
dev.to › jaiminbariya › python-complexity-cheat-sheet-3plf
Python Complexity Cheat Sheet 🚀 - DEV Community
January 25, 2025 - I’m thrilled to share that I’ve created a comprehensive Python Complexity Cheat Sheet 🐍 for all the coders out there who want to write efficient and optimized Python code. This cheat sheet is designed to help you understand the average and worst-case complexities of operations across Python’s built-in data structures. ... Understanding the time complexity of operations is essential for writing scalable applications.
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GitHub
github.com › ultimatecoder › python-time-complexity-cheat-sheet › blob › master › README.md
python-time-complexity-cheat-sheet/README.md at master · ultimatecoder/python-time-complexity-cheat-sheet
Remembering complexity of each built-in function of Python is difficult for me and I am sure it will be difficult for you too. This is a collection of runtime and space complexity that I have calculated by observing the latest source code of CPython. You can use this as a cheat sheet.
Author   ultimatecoder
Find elsewhere
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TutorialsPoint
tutorialspoint.com › complexity-cheat-sheet-for-python-operations
Complexity Cheat Sheet for Python Operations
August 7, 2023 - Time complexity measures how algorithm execution time grows with input size. It uses Big O notation to set an upper bound on worst-case performance. Understanding complexity helps you choose the right data structures and optimize your code.
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Codecademy
codecademy.com › learn › algorithmic-concepts-python › modules › algorithmic-complexity-python › cheatsheet
Algorithmic Concepts: Algorithmic Complexity Cheatsheet | Codecademy
We compute the big-Ω by counting how many iterations an algorithm will take in the best-case scenario based on an input of N. For example, a Bubble Sort algorithm has a running time of Ω(N) because in the best case scenario the list is already sorted, and the bubble sort will terminate after the first iteration. ... Learn about the computer science concepts of data structures and algorithms and build implementations of each from scratch in modern Python.
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GitHub
github.com › jaimin-bariya › python-complexity-cheatsheet › blob › main › complexity_cheatsheet › sets.md
python-complexity-cheatsheet/complexity_cheatsheet/sets.md at main · jaimin-bariya/python-complexity-cheatsheet
A concise and comprehensive cheat sheet covering time complexities of Python's built-in data structures like Lists, Dictionaries, Sets, Tuples, and Strings. This resource is designed to help developers write efficient and optimized Python code.
Author   jaimin-bariya
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GitHub
github.com › ultimatecoder › python-time-complexity-cheat-sheet › blob › master › source › cheatsheet.tex
python-time-complexity-cheat-sheet/source/cheatsheet.tex at master · ultimatecoder/python-time-complexity-cheat-sheet
Runtime of core Python functions. Contribute to ultimatecoder/python-time-complexity-cheat-sheet development by creating an account on GitHub.
Author   ultimatecoder
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GitHub
github.com › ReaVNaiL › Big-O-Complexity-Cheat-Sheet
GitHub - ReaVNaiL/Big-O-Complexity-Cheat-Sheet: A comprehensive guide to understanding the time and space complexities of common algorithms and data structures. This repository provides a concise summary of the key concepts in algorithm analysis, presented in an easy-to-read cheat sheet format. · GitHub
Welcome to the "Big-O Complexity Cheat Sheet" repository! This cheat sheet is designed to provide a quick reference guide for understanding the time and space complexity of various algorithms and data structures.
Starred by 171 users
Forked by 18 users
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freeCodeCamp
freecodecamp.org › news › big-o-cheat-sheet-time-complexity-chart
Big O Cheat Sheet – Time Complexity Chart
November 7, 2024 - We will be focusing on time complexity in this guide. This will be an in-depth cheatsheet to help you understand how to calculate the time complexity for any algorithm.
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GitHub
github.com › jaimin-bariya › python-complexity-cheatsheet › blob › main › complexity_cheatsheet › dictionaries.md
python-complexity-cheatsheet/complexity_cheatsheet/dictionaries.md at main · jaimin-bariya/python-complexity-cheatsheet
A concise and comprehensive cheat sheet covering time complexities of Python's built-in data structures like Lists, Dictionaries, Sets, Tuples, and Strings. This resource is designed to help developers write efficient and optimized Python code. - python-complexity-cheatsheet/complexity_che...
Author   jaimin-bariya
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Shodan
skerritt.blog › big-o
All You Need to Know About Big O Notation [Python Examples]
June 21, 2023 - In computer science, time complexity is the computational complexity that describes the amount of time it takes to run an algorithm. Big O notation is a method for determining how fast an algorithm is. Using Big O notation, we can learn whether our algorithm is fast or slow. This knowledge lets us design better algorithms. This article is written using agnostic Python.
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Towards Data Science
towardsdatascience.com › home › latest › recursion vs dynamic programming – fibonacci(leetcode 509)
Recursion vs Dynamic Programming - Fibonacci(Leetcode 509) | Towards Data Science
March 5, 2025 - And the space complexity would ... we need is the same as n given. ... The red line represents the time complexity of recursion, and the blue line represents dynamic programming....
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Medium
medium.com › @punitvara › this-article-will-be-a-collection-of-cheat-sheets-that-you-can-use-as-you-solve-problems-and-5ff8d743edd4
This article will be a collection of cheat sheets that you can use as you solve problems and… | by Punit Vara | Medium
May 21, 2024 - This article will be a collection of cheat sheets that you can use as you solve problems and prepare for interviews. You will find: Time complexity (Big O) cheat sheet General DS/A flowchart (when to …
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Hackr
hackr.io › home › articles › cheat sheets
Big O Notation Cheat Sheet | What Is Time & Space Complexity?
January 30, 2025 - Today, in the modern world of complex applications and software, it is necessary to perform well in a different environment. For this, you need to optimize your code without any lag while executing the underlying code. Whenever you get the result of the Big O notation, you will be able to check if you have a lower running time than your competitors. Thus, it has become necessary for programmers to check their code and analyze it thoroughly. This Big O Notation cheat sheet (time complexity cheat sheet or data structure cheat sheet) will help you understand various complexities.