Dates frontend is very slow - choosing a date is very slow and unresponsive

Summary

Dates are very slow to manipulate inside the browser. Feels “buggy”.

Steps to reproduce

Code app.py:

import streamlit as st

def main():
    st.date_input("date")

if __name__ == "__main__":
    main()

Then,

streamlit run app.py

Finally, try to manipulate with your cursor the date object inside your browser.

Expected behavior:

It should be fast to choose a date.

Actual behavior:

Interface is very slow and therefore hard to use

Is this a regression?

yes

Debug info

• Streamlit version: 0.64.1.dev20200728
• Python version: Python 3.6.8
• Using virtualenvwrapper
• OS version: Ubuntu 18.04
• Browser version: Mozilla Firefox 78.0.2

[karriebear]

Thanks for looking into this @vinzeebreak! There are no external files that are included as part of our release process. At first I was quite puzzled but I think we were just comparing the tags in reverse. Looking at this makes much more sense: https://github.com/streamlit/streamlit/compare/0.63.2.dev20200721...0.63.2.dev20200722

It’s very probable this is a regression caused by #1747

[PaulMatthieu]

Experiencing the same behavior with the following configuration:

streamlit-nightly-0.64.1.dev20200728 OS: Ubuntu 19.10 Python 3.8.2 Mozilla Firefox 78.0.2 (64-bit)