Only render visible components

[pngwn]

Closes: #5311

[gradio-pr-bot]

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---

Install Gradio from this PR

pip install https://gradio-pypi-previews.s3.amazonaws.com/affd1353009e3ddcec102cbbe0feb6350ba2f68d/gradio-5.9.0-py3-none-any.whl

Install Gradio Python Client from this PR

pip install "gradio-client @ git+https://github.com/gradio-app/gradio@affd1353009e3ddcec102cbbe0feb6350ba2f68d#subdirectory=client/python"

Install Gradio JS Client from this PR

npm install https://gradio-npm-previews.s3.amazonaws.com/affd1353009e3ddcec102cbbe0feb6350ba2f68d/gradio-client-1.8.0.tgz

Use Lite from this PR

<script type="module" src="https://gradio-lite-previews.s3.amazonaws.com/affd1353009e3ddcec102cbbe0feb6350ba2f68d/dist/lite.js""></script>

[gradio-pr-bot]

🦄 change detected

This Pull Request includes changes to the following packages.

Package	Version
@gradio/atoms	minor
@gradio/core	minor
@gradio/imageeditor	minor
@gradio/markdown	minor
@gradio/markdown-code	minor
@gradio/tabitem	minor
@gradio/tabs	minor
gradio	minor

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Only render visible components

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[abidlabs]

Taking a look at this now @pngwn but just a thought that this might be a good time to add a demo along the lines #5217 and benchmark that demo before and after this PR, leading to some nice comms around how much faster / less memory-intensive gradio is with this PR

[abidlabs]

Very very cool @pngwn! I tried a lot of demos and generally everything is working as expected. Only two exceptions:

(1) The ImageEditor does not seem to be saving its state when unrendered and re-rendered. Try with this example:

import gradio as gr

with gr.Blocks() as demo:
    with gr.Tab("Abc"):
        gr.Textbox()
    with gr.Tab("Abc"):
        gr.ImageEditor()

demo.launch()

Screen.Recording.2024-12-16.at.3.54.09.PM.mov

I checked and on main, the ImageEditor state is saved.

(2) The webcam also seems to reset when unrendered and re-rendered. Try running demo/webcam_constraints/run.py.

Screen.Recording.2024-12-16.at.3.52.40.PM.mov

It turns out that the behavior on main is also broken but in a different way. In main, the webcam recording just becomes corrupted when a different tab is selected. The behavior I would expect is that when a different tab is selected, the webcam stops recording but the video recorded up until that point is saved.

[aliabid94]

Tried to break it with gr.render but everything worked great!