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Splitting sandpack from main bundle #4256

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merged 30 commits into from
Feb 16, 2022

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harish-sethuraman
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@harish-sethuraman harish-sethuraman commented Jan 30, 2022

Tried to split the sandpack and added a fallback with suspense

Adding suspense to Sandpack reduced ~9.55KB
Adding a wrapper to codeBlock and Sandpack reduced ~150KB

Fallback preview here: https://beta-reactjs-org-namamgdvj-fbopensource.vercel.app/learn

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github-actions bot commented Jan 30, 2022

Size Changes

📦 Next.js Bundle Analysis

This analysis was generated by the next.js bundle analysis action 🤖

🎉 Global Bundle Size Decreased

Page Size (compressed)
global 92.86 KB (🟢 -488 B)
Details

The global bundle is the javascript bundle that loads alongside every page. It is in its own category because its impact is much higher - an increase to its size means that every page on your website loads slower, and a decrease means every page loads faster.

Any third party scripts you have added directly to your app using the <script> tag are not accounted for in this analysis

If you want further insight into what is behind the changes, give @next/bundle-analyzer a try!

One Hundred Eighty-three Pages Changed Size

The following pages changed size from the code in this PR compared to its base branch:

Page Size (compressed) First Load
/ 59.17 KB (🟢 -158.97 KB) 152.03 KB
/404 58.28 KB (🟢 -158.97 KB) 151.14 KB
/apis 58.83 KB (🟢 -158.97 KB) 151.69 KB
/apis/reactdom 58.98 KB (🟢 -158.98 KB) 151.83 KB
/apis/render 61.04 KB (🟢 -158.98 KB) 153.9 KB
/apis/usestate 69.99 KB (🟢 -158.98 KB) 162.84 KB
/blog/2013/06/02/jsfiddle-integration 69.55 KB (🟢 -158.97 KB) 162.41 KB
/blog/2013/06/05/why-react 71.27 KB (🟢 -158.98 KB) 164.13 KB
/blog/2013/06/12/community-roundup 70.98 KB (🟢 -158.97 KB) 163.83 KB
/blog/2013/06/19/community-roundup-2 71.65 KB (🟢 -158.97 KB) 164.5 KB
/blog/2013/06/21/react-v0-3-3 69.7 KB (🟢 -158.97 KB) 162.55 KB
/blog/2013/06/27/community-roundup-3 72.01 KB (🟢 -158.97 KB) 164.87 KB
/blog/2013/07/02/react-v0-4-autobind-by-default 70.31 KB (🟢 -158.98 KB) 163.17 KB
/blog/2013/07/03/community-roundup-4 71.38 KB (🟢 -158.97 KB) 164.24 KB
/blog/2013/07/11/react-v0-4-prop-validation-and-default-values 70.18 KB (🟢 -158.98 KB) 163.04 KB
/blog/2013/07/17/react-v0-4-0 70.89 KB (🟢 -158.97 KB) 163.75 KB
/blog/2013/07/23/community-roundup-5 71.78 KB (🟢 -158.97 KB) 164.63 KB
/blog/2013/07/26/react-v0-4-1 69.66 KB (🟢 -158.97 KB) 162.52 KB
/blog/2013/07/30/use-react-and-jsx-in-ruby-on-rails 70.26 KB (🟢 -158.97 KB) 163.12 KB
/blog/2013/08/05/community-roundup-6 71.07 KB (🟢 -158.97 KB) 163.93 KB
/blog/2013/08/19/use-react-and-jsx-in-python-applications 70.27 KB (🟢 -158.97 KB) 163.13 KB
/blog/2013/08/26/community-roundup-7 71.24 KB (🟢 -158.97 KB) 164.1 KB
/blog/2013/09/24/community-roundup-8 72.67 KB (🟢 -158.97 KB) 165.53 KB
/blog/2013/10/03/community-roundup-9 71.61 KB (🟢 -158.97 KB) 164.46 KB
/blog/2013/10/16/react-v0.5.0 71.29 KB (🟢 -158.97 KB) 164.15 KB
/blog/2013/10/29/react-v0-5-1 69.65 KB (🟢 -158.97 KB) 162.51 KB
/blog/2013/11/06/community-roundup-10 73.27 KB (🟢 -158.98 KB) 166.12 KB
/blog/2013/11/18/community-roundup-11 72.35 KB (🟢 -158.97 KB) 165.2 KB
/blog/2013/12/18/react-v0.5.2-v0.4.2 70.12 KB (🟢 -158.97 KB) 162.98 KB
/blog/2013/12/19/react-v0.8.0 70.54 KB (🟢 -158.97 KB) 163.4 KB
/blog/2013/12/23/community-roundup-12 72 KB (🟢 -158.97 KB) 164.86 KB
/blog/2013/12/30/community-roundup-13 71.78 KB (🟢 -158.98 KB) 164.64 KB
/blog/2014/01/02/react-chrome-developer-tools 70.04 KB (🟢 -158.97 KB) 162.9 KB
/blog/2014/01/06/community-roundup-14 71.38 KB (🟢 -158.97 KB) 164.24 KB
/blog/2014/02/05/community-roundup-15 72.6 KB (🟢 -158.97 KB) 165.45 KB
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/blog/2014/02/20/react-v0.9 73.16 KB (🟢 -158.97 KB) 166.01 KB
/blog/2014/02/24/community-roundup-17 72.02 KB (🟢 -158.97 KB) 164.88 KB
/blog/2014/03/14/community-roundup-18 72.99 KB (🟢 -158.97 KB) 165.84 KB
/blog/2014/03/19/react-v0.10-rc1 71.29 KB (🟢 -158.97 KB) 164.15 KB
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/blog/2016/01/08/A-implies-B-does-not-imply-B-implies-A 70.91 KB (🟢 -158.97 KB) 163.76 KB
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/blog/2016/02/19/new-versioning-scheme 71.1 KB (🟢 -158.97 KB) 163.95 KB
/blog/2016/03/07/react-v15-rc1 73.85 KB (🟢 -158.97 KB) 166.7 KB
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/blog/2016/09/28/our-first-50000-stars 75.28 KB (🟢 -158.97 KB) 168.14 KB
/blog/2016/11/16/react-v15.4.0 73.23 KB (🟢 -158.97 KB) 166.09 KB
/blog/2017/04/07/react-v15.5.0 73.8 KB (🟢 -158.98 KB) 166.65 KB
/blog/2017/05/18/whats-new-in-create-react-app 73.19 KB (🟢 -158.97 KB) 166.05 KB
/blog/2017/06/13/react-v15.6.0 71.82 KB (🟢 -158.97 KB) 164.67 KB
/blog/2017/07/26/error-handling-in-react-16 72.17 KB (🟢 -158.97 KB) 165.02 KB
/blog/2017/09/08/dom-attributes-in-react-16 72.59 KB (🟢 -158.97 KB) 165.45 KB
/blog/2017/09/25/react-v15.6.2 70.93 KB (🟢 -158.98 KB) 163.79 KB
/blog/2017/09/26/react-v16.0 76.06 KB (🟢 -158.98 KB) 168.92 KB
/blog/2017/11/28/react-v16.2.0-fragment-support 73.99 KB (🟢 -158.97 KB) 166.85 KB
/blog/2017/12/07/introducing-the-react-rfc-process 70.51 KB (🟢 -158.98 KB) 163.37 KB
/blog/2017/12/15/improving-the-repository-infrastructure 86.3 KB (🟢 -158.97 KB) 179.16 KB
/blog/2018/03/01/sneak-peek-beyond-react-16 70.47 KB (🟢 -158.97 KB) 163.33 KB
/blog/2018/03/27/update-on-async-rendering 75.71 KB (🟢 -158.97 KB) 168.57 KB
/blog/2018/03/29/react-v-16-3 72.53 KB (🟢 -158.97 KB) 165.39 KB
/blog/2018/05/23/react-v-16-4 72.67 KB (🟢 -158.97 KB) 165.53 KB
/blog/2018/06/07/you-probably-dont-need-derived-state 76.33 KB (🟢 -158.97 KB) 169.19 KB
/blog/2018/08/01/react-v-16-4-2 71.32 KB (🟢 -158.98 KB) 164.18 KB
/blog/2018/09/10/introducing-the-react-profiler 72.93 KB (🟢 -158.97 KB) 165.79 KB
/blog/2018/10/01/create-react-app-v2 73.41 KB (🟢 -158.97 KB) 166.27 KB
/blog/2018/10/23/react-v-16-6 72.61 KB (🟢 -158.97 KB) 165.46 KB
/blog/2018/11/13/react-conf-recap 70.32 KB (🟢 -158.98 KB) 163.18 KB
/blog/2018/11/27/react-16-roadmap 76.51 KB (🟢 -158.97 KB) 169.37 KB
/blog/2018/12/19/react-v-16-7 71.44 KB (🟢 -158.97 KB) 164.3 KB
/blog/2019/02/06/react-v16.8.0 73.71 KB (🟢 -158.97 KB) 166.57 KB
/blog/2019/02/23/is-react-translated-yet 73.27 KB (🟢 -158.98 KB) 166.13 KB
/blog/2019/08/08/react-v16.9.0 76.21 KB (🟢 -158.97 KB) 169.06 KB
/blog/2019/08/15/new-react-devtools 70.81 KB (🟢 -158.97 KB) 163.67 KB
/blog/2019/10/22/react-release-channels 72.62 KB (🟢 -158.97 KB) 165.48 KB
/blog/2019/11/06/building-great-user-experiences-with-concurrent-mode-and-suspense 77.33 KB (🟢 -158.97 KB) 170.18 KB
/blog/2020/02/26/react-v16.13.0 73.55 KB (🟢 -158.97 KB) 166.41 KB
/blog/2020/08/10/react-v17-rc 79.83 KB (🟢 -158.97 KB) 172.69 KB
/community 58.86 KB (🟢 -158.98 KB) 151.72 KB
/community/acknowledgements 60.05 KB (🟢 -158.98 KB) 152.91 KB
/community/meet-the-team 60.57 KB (🟢 -158.98 KB) 153.43 KB
/learn 63.36 KB (🟢 -158.98 KB) 156.22 KB
/learn/add-react-to-a-website 63.69 KB (🟢 -158.98 KB) 156.54 KB
/learn/adding-interactivity 65.49 KB (🟢 -158.98 KB) 158.35 KB
/learn/choosing-the-state-structure 71.23 KB (🟢 -158.97 KB) 164.09 KB
/learn/conditional-rendering 63.46 KB (🟢 -158.98 KB) 156.32 KB
/learn/describing-the-ui 62.68 KB (🟢 -158.97 KB) 155.54 KB
/learn/editor-setup 59.95 KB (🟢 -158.98 KB) 152.81 KB
/learn/escape-hatches 58.2 KB (🟢 -158.97 KB) 151.05 KB
/learn/extracting-state-logic-into-a-reducer 68.86 KB (🟢 -158.98 KB) 161.72 KB
/learn/importing-and-exporting-components 61.86 KB (🟢 -158.97 KB) 154.72 KB
/learn/installation 59.52 KB (🟢 -158.98 KB) 152.38 KB
/learn/javascript-in-jsx-with-curly-braces 61.94 KB (🟢 -158.98 KB) 154.79 KB
/learn/keeping-components-pure 66.07 KB (🟢 -158.97 KB) 158.93 KB
/learn/managing-state 64.79 KB (🟢 -158.98 KB) 157.65 KB
/learn/manipulating-the-dom-with-refs 66.7 KB (🟢 -158.98 KB) 159.56 KB
/learn/passing-data-deeply-with-context 66.21 KB (🟢 -158.98 KB) 159.07 KB
/learn/passing-props-to-a-component 65.64 KB (🟢 -158.98 KB) 158.5 KB
/learn/preserving-and-resetting-state 68.45 KB (🟢 -158.98 KB) 161.31 KB
/learn/queueing-a-series-of-state-updates 63.43 KB (🟢 -158.98 KB) 156.29 KB
/learn/react-developer-tools 59.39 KB (🟢 -158.98 KB) 152.24 KB
/learn/reacting-to-input-with-state 67.91 KB (🟢 -158.98 KB) 160.76 KB
/learn/referencing-values-with-refs 64.96 KB (🟢 -158.97 KB) 157.81 KB
/learn/render-and-commit 61.93 KB (🟢 -158.97 KB) 154.79 KB
/learn/rendering-lists 65.99 KB (🟢 -158.97 KB) 158.85 KB
/learn/responding-to-events 64.98 KB (🟢 -158.98 KB) 157.84 KB
/learn/scaling-up-with-reducer-and-context 63 KB (🟢 -158.98 KB) 155.86 KB
/learn/sharing-state-between-components 63.71 KB (🟢 -158.98 KB) 156.57 KB
/learn/start-a-new-react-project 60.36 KB (🟢 -158.98 KB) 153.21 KB
/learn/state-a-components-memory 69.16 KB (🟢 -158.98 KB) 162.01 KB
/learn/state-as-a-snapshot 62.98 KB (🟢 -158.98 KB) 155.84 KB
/learn/thinking-in-react 64.8 KB (🟢 -158.98 KB) 157.66 KB
/learn/updating-arrays-in-state 67.04 KB (🟢 -158.97 KB) 159.89 KB
/learn/updating-objects-in-state 66.76 KB (🟢 -158.98 KB) 159.62 KB
/learn/writing-markup-with-jsx 61.86 KB (🟢 -158.98 KB) 154.72 KB
/learn/your-first-component 62.77 KB (🟢 -158.98 KB) 155.63 KB
Details

Only the gzipped size is provided here based on an expert tip.

First Load is the size of the global bundle plus the bundle for the individual page. If a user were to show up to your website and land on a given page, the first load size represents the amount of javascript that user would need to download. If next/link is used, subsequent page loads would only need to download that page's bundle (the number in the "Size" column), since the global bundle has already been downloaded.

Any third party scripts you have added directly to your app using the <script> tag are not accounted for in this analysis

Next to the size is how much the size has increased or decreased compared with the base branch of this PR. If this percentage has increased by 10% or more, there will be a red status indicator applied, indicating that special attention should be given to this.

@harish-sethuraman
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harish-sethuraman commented Jan 30, 2022

Sandpack (without highlighting and output) renders, Then the fallback and then the complete sandpack...

Video
Screen.Recording.2022-01-30.at.1.05.11.PM.mov

@gaearon
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gaearon commented Feb 1, 2022

@harish-sethuraman
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harish-sethuraman commented Feb 11, 2022

v12.0.11-canary.9 tag in nex.js with the changes we require broke the build 🤔.

@harish-sethuraman
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v12.0.11-canary.10 even this doesn't work I even tried latest canary. Only the stable tag worked. Should we report this ?

@harish-sethuraman
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@danilowoz during the initial render the sandpack content is loaded but without the code formatting (it is loaded as string). Later we get the fallback and then the formatted code. Need help in finding why code is rendered as string during initial render.

PS: Build fails you can try the same change in local

wYuRiv-W

@danilowoz
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@harish-sethuraman currently, it's not possible, due to some CodeMirror limitations. But Sandpack is going to support it very soon, as we made some important progress in SSR support (codesandbox/sandpack#276).

If you want to give it a try, take a look at this PR https://github.com/danilowoz/reactjs.org/pull/1 - but, please don't use it for production, there are a few breaking change comming in this implementation.

@harish-sethuraman
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This change splits sandpack and codeblock into separate chunks. So there are lot of components to test.

@gaearon
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gaearon commented Feb 16, 2022

looks great. wanna press merge? if something breaks we'll roll back

@harish-sethuraman
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🚀

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4 participants