Polars vs Pandas - what's the difference?
07-19, 15:30–16:00 (Europe/Prague), South Hall 2A

Have you heard about Polars? What are the differences? Is Polars replacing Pandas? In this talk, we are going to demystify these questions about Polars. Compares the differences between Polars and Pandas, and explains the pros and cons of both of them.

In this talk, we will explore what is Polars, a new tabular data management package that is written in Rust and used Arrow. Many people compare it to Pandas, the goto package for tabular data management for years. However, there is still some confusion regarding what Polars really is, whether or not it is more efficient than Pandas and if you can just replace Pandas with Polars. Hopefully, by the end of the talk, all of these questions will be answered and for people new to Polars, they will feel encouraged to try it out and more confident to make the switch.


This talk is for data scientists who have been using Pandas and have only heard of the name Polars to understand more about the difference and similarities between the two libraries and can make a better decision of which one to use when they start their next project.


  • Introduction: why I am talking about this (5 mins)
  • Polars is not Pandas 2.0 (5 mins)
  • If you do this in Pandas, do that in Polars (10 mins)
  • Performance comparison (5 mins)
  • Which one should I use? (5 mins)

Expected audience expertise


Before working in Developer Relations, Cheuk has been a Data Scientist in various companies which demands high numerical and programmatical skills, especially in Python. To follow her passion for the tech community, Cheuk is now working with the open-source community. Cheuk also contributes to multiple Open Source libraries like Hypothesis, Django and Pandas.

Besides her work, Cheuk enjoys talking about Python on personal streaming platforms and podcasts. Cheuk has also been a speaker at Universities and various conferences. Besides speaking at conferences, Cheuk also organises events for developers. Conferences that Cheuk has organized include EuroPython (which she is a board member), PyData Global and Pyjamas Conf. Believing in Tech Diversity and Inclusion, Cheuk constantly organizes workshops and mentored sprints for minority groups. In 2021, Cheuk has become a Python Software Foundation fellow.

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