In streamlit hello, preload Python modules that are slow to compile in a fresh venv
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🎉 Snyk checks have passed. No issues have been found so far.✅ security/snyk check is complete. No issues have been found. (View Details) ✅ license/snyk check is complete. No issues have been found. (View Details) |
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✅ PR preview is ready!
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SGTM! |
sfc-gh-nbellante
approved these changes
Sep 24, 2025
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sfc-gh-nbellante
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Love this idea. Approving as is, and proactively approving the thread approach we discussed. (If you want me to take another look at it after that commit let me know!)
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FYI: I tried loading |
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Describe your changes
Today, when running
streamlit helloin a fresh venv the first loads quickly (yay!) but then subpages like the "Dataframe demo" are super slow. Here's what it looks like:before.mov
This slowness is due to the
import pandas, which in a fresh venv requires a slow compilation step.This PR makes up for this by adding
import pandasto the bottom of the first page ofstreamlit hello, after all important content has loaded. My feeling is that this makes everything feel faster. See for yourself:after.mov
GitHub Issue Link (if applicable)
n/a
Testing Plan
Unit Tests (JS and/or Python)E2E TestsAny manual testing needed?Contribution License Agreement
By submitting this pull request you agree that all contributions to this project are made under the Apache 2.0 license.