Enable streaming SSR #4047
Open
Enable streaming SSR #4047
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This is now decoupled from Next.js: https://edge-runtime.vercel.app |
gaearon
force-pushed
the
next-streaming
branch
from
b369aa1 to
60cea85
Compare
gaearon
force-pushed
the
next-streaming
branch
from
60cea85 to
6bf028c
Compare
gaearon
force-pushed
the
next-streaming
branch
from
6bf028c to
46128b5
Compare
Size Changes📦 Next.js Bundle AnalysisThis analysis was generated by the next.js bundle analysis action 🤖
|
| Page | Size (compressed) |
|---|---|
global |
91.5 KB (🟡 +337 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-five Pages Changed Size
The following pages changed size from the code in this PR compared to its base branch:
| Page | Size (compressed) | First Load |
|---|---|---|
/ |
203.67 KB (🟡 +533 B) |
295.17 KB |
/404 |
202.78 KB (🟡 +543 B) |
294.28 KB |
/blog |
37.32 KB (🟢 -604 B) |
128.82 KB |
/blog/2013/06/02/jsfiddle-integration |
213.8 KB (🟢 -44 B) |
305.3 KB |
/blog/2013/06/05/why-react |
215.53 KB (🟢 -45 B) |
307.03 KB |
/blog/2013/06/12/community-roundup |
215.23 KB (🟢 -45 B) |
306.73 KB |
/blog/2013/06/19/community-roundup-2 |
215.9 KB (🟢 -45 B) |
307.4 KB |
/blog/2013/06/21/react-v0-3-3 |
213.95 KB (🟢 -44 B) |
305.45 KB |
/blog/2013/06/27/community-roundup-3 |
216.26 KB (🟢 -47 B) |
307.76 KB |
/blog/2013/07/02/react-v0-4-autobind-by-default |
214.57 KB (🟢 -42 B) |
306.07 KB |
/blog/2013/07/03/community-roundup-4 |
215.63 KB (🟢 -45 B) |
307.14 KB |
/blog/2013/07/11/react-v0-4-prop-validation-and-default-values |
214.43 KB (🟢 -46 B) |
305.93 KB |
/blog/2013/07/17/react-v0-4-0 |
215.14 KB (🟢 -45 B) |
306.65 KB |
/blog/2013/07/23/community-roundup-5 |
216.03 KB (🟢 -43 B) |
307.53 KB |
/blog/2013/07/26/react-v0-4-1 |
213.91 KB (🟢 -44 B) |
305.41 KB |
/blog/2013/07/30/use-react-and-jsx-in-ruby-on-rails |
214.51 KB (🟢 -44 B) |
306.01 KB |
/blog/2013/08/05/community-roundup-6 |
215.32 KB (🟢 -44 B) |
306.82 KB |
/blog/2013/08/19/use-react-and-jsx-in-python-applications |
214.52 KB (🟢 -44 B) |
306.03 KB |
/blog/2013/08/26/community-roundup-7 |
215.49 KB (🟢 -45 B) |
306.99 KB |
/blog/2013/09/24/community-roundup-8 |
216.92 KB (🟢 -45 B) |
308.42 KB |
/blog/2013/10/03/community-roundup-9 |
215.86 KB (🟢 -45 B) |
307.36 KB |
/blog/2013/10/16/react-v0.5.0 |
215.54 KB (🟢 -44 B) |
307.04 KB |
/blog/2013/10/29/react-v0-5-1 |
213.9 KB (🟢 -46 B) |
305.4 KB |
/blog/2013/11/06/community-roundup-10 |
217.52 KB (🟢 -44 B) |
309.02 KB |
/blog/2013/11/18/community-roundup-11 |
216.6 KB (🟢 -45 B) |
308.1 KB |
/blog/2013/12/18/react-v0.5.2-v0.4.2 |
214.37 KB (🟢 -46 B) |
305.87 KB |
/blog/2013/12/19/react-v0.8.0 |
214.79 KB (🟢 -45 B) |
306.29 KB |
/blog/2013/12/23/community-roundup-12 |
216.25 KB (🟢 -45 B) |
307.75 KB |
/blog/2013/12/30/community-roundup-13 |
216.04 KB (🟢 -42 B) |
307.54 KB |
/blog/2014/01/02/react-chrome-developer-tools |
214.29 KB (🟢 -45 B) |
305.79 KB |
/blog/2014/01/06/community-roundup-14 |
215.63 KB (🟢 -45 B) |
307.13 KB |
/blog/2014/02/05/community-roundup-15 |
216.84 KB (🟢 -44 B) |
308.35 KB |
/blog/2014/02/15/community-roundup-16 |
216.56 KB (🟢 -44 B) |
308.06 KB |
/blog/2014/02/16/react-v0.9-rc1 |
216.96 KB (🟢 -45 B) |
308.46 KB |
/blog/2014/02/20/react-v0.9 |
217.41 KB (🟢 -47 B) |
308.91 KB |
/blog/2014/02/24/community-roundup-17 |
216.27 KB (🟢 -43 B) |
307.78 KB |
/blog/2014/03/14/community-roundup-18 |
217.24 KB (🟢 -44 B) |
308.74 KB |
/blog/2014/03/19/react-v0.10-rc1 |
215.55 KB (🟢 -45 B) |
307.05 KB |
/blog/2014/03/21/react-v0.10 |
215.57 KB (🟢 -45 B) |
307.07 KB |
/blog/2014/03/28/the-road-to-1.0 |
215.68 KB (🟢 -45 B) |
307.18 KB |
/blog/2014/04/04/reactnet |
214.32 KB (🟢 -45 B) |
305.83 KB |
/blog/2014/05/06/flux |
214.45 KB (🟢 -43 B) |
305.95 KB |
/blog/2014/05/29/one-year-of-open-source-react |
214.67 KB (🟢 -44 B) |
306.17 KB |
/blog/2014/06/27/community-roundup-19 |
216.22 KB (🟢 -44 B) |
307.72 KB |
/blog/2014/07/13/react-v0.11-rc1 |
216.6 KB (🟢 -45 B) |
308.1 KB |
/blog/2014/07/17/react-v0.11 |
217.86 KB (🟢 -45 B) |
309.36 KB |
/blog/2014/07/25/react-v0.11.1 |
214.81 KB (🟢 -45 B) |
306.31 KB |
/blog/2014/07/28/community-roundup-20 |
216.36 KB (🟢 -44 B) |
307.86 KB |
/blog/2014/07/30/flux-actions-and-the-dispatcher |
215.99 KB (🟢 -45 B) |
307.49 KB |
/blog/2014/08/03/community-roundup-21 |
216.03 KB (🟢 -46 B) |
307.53 KB |
/blog/2014/09/03/introducing-the-jsx-specification |
214.03 KB (🟢 -44 B) |
305.53 KB |
/blog/2014/09/12/community-round-up-22 |
216.51 KB (🟢 -42 B) |
308.01 KB |
/blog/2014/09/16/react-v0.11.2 |
214.8 KB (🟢 -45 B) |
306.3 KB |
/blog/2014/09/24/testing-flux-applications |
217.98 KB (🟢 -45 B) |
309.48 KB |
/blog/2014/10/14/introducing-react-elements |
216.94 KB (🟢 -42 B) |
308.44 KB |
/blog/2014/10/16/react-v0.12-rc1 |
216.9 KB (🟢 -48 B) |
308.4 KB |
/blog/2014/10/17/community-roundup-23 |
217.47 KB (🟢 -46 B) |
308.98 KB |
/blog/2014/10/27/react-js-conf |
214.08 KB (🟢 -45 B) |
305.58 KB |
/blog/2014/10/28/react-v0.12 |
216.84 KB (🟢 -45 B) |
308.34 KB |
/blog/2014/11/24/react-js-conf-updates |
214.46 KB (🟢 -44 B) |
305.96 KB |
/blog/2014/11/25/community-roundup-24 |
217.71 KB (🟢 -45 B) |
309.21 KB |
/blog/2014/12/18/react-v0.12.2 |
214.49 KB (🟢 -45 B) |
305.99 KB |
/blog/2014/12/19/react-js-conf-diversity-scholarship |
214.88 KB (🟢 -45 B) |
306.39 KB |
/blog/2015/01/27/react-v0.13.0-beta-1 |
215.85 KB (🟢 -47 B) |
307.35 KB |
/blog/2015/02/18/react-conf-roundup-2015 |
217.84 KB (🟢 -45 B) |
309.34 KB |
/blog/2015/02/20/introducing-relay-and-graphql |
216.99 KB (🟢 -45 B) |
308.49 KB |
/blog/2015/02/24/react-v0.13-rc1 |
215.9 KB (🟢 -45 B) |
307.4 KB |
/blog/2015/02/24/streamlining-react-elements |
218.45 KB (🟢 -45 B) |
309.95 KB |
/blog/2015/03/03/react-v0.13-rc2 |
215.23 KB (🟢 -46 B) |
306.73 KB |
/blog/2015/03/04/community-roundup-25 |
216.19 KB (🟢 -46 B) |
307.69 KB |
/blog/2015/03/10/react-v0.13 |
216.51 KB (🟢 -45 B) |
308.01 KB |
/blog/2015/03/16/react-v0.13.1 |
214.33 KB (🟢 -44 B) |
305.83 KB |
/blog/2015/03/19/building-the-facebook-news-feed-with-relay |
217.08 KB (🟢 -44 B) |
308.59 KB |
/blog/2015/03/26/introducing-react-native |
214.22 KB (🟢 -46 B) |
305.72 KB |
/blog/2015/03/30/community-roundup-26 |
216.16 KB (🟢 -44 B) |
307.66 KB |
/blog/2015/04/17/react-native-v0.4 |
215.07 KB (🟢 -44 B) |
306.57 KB |
/blog/2015/04/18/react-v0.13.2 |
214.4 KB (🟢 -45 B) |
305.9 KB |
/blog/2015/05/01/graphql-introduction |
218.89 KB (🟢 -45 B) |
310.39 KB |
/blog/2015/05/08/react-v0.13.3 |
214.29 KB (🟢 -43 B) |
305.79 KB |
/blog/2015/05/22/react-native-release-process |
214.44 KB (🟢 -45 B) |
305.94 KB |
/blog/2015/06/12/deprecating-jstransform-and-react-tools |
214.9 KB (🟢 -45 B) |
306.4 KB |
/blog/2015/07/03/react-v0.14-beta-1 |
216.41 KB (🟢 -46 B) |
307.91 KB |
/blog/2015/08/03/new-react-devtools-beta |
215.01 KB (🟢 -47 B) |
306.51 KB |
/blog/2015/08/11/relay-technical-preview |
215.07 KB (🟢 -45 B) |
306.57 KB |
/blog/2015/08/13/reacteurope-roundup |
216.66 KB (🟢 -45 B) |
308.16 KB |
/blog/2015/09/02/new-react-developer-tools |
214.43 KB (🟢 -43 B) |
305.93 KB |
/blog/2015/09/10/react-v0.14-rc1 |
220.11 KB (🟢 -44 B) |
311.62 KB |
/blog/2015/09/14/community-roundup-27 |
216.59 KB (🟢 -44 B) |
308.09 KB |
/blog/2015/10/01/react-render-and-top-level-api |
215.56 KB (🟢 -45 B) |
307.06 KB |
/blog/2015/10/07/react-v0.14 |
220.6 KB (🟢 -46 B) |
312.1 KB |
/blog/2015/10/19/reactiflux-is-moving-to-discord |
216.3 KB (🟢 -44 B) |
307.81 KB |
/blog/2015/10/28/react-v0.14.1 |
214.32 KB (🟢 -45 B) |
305.82 KB |
/blog/2015/11/02/react-v0.14.2 |
214.35 KB (🟢 -44 B) |
305.85 KB |
/blog/2015/11/18/react-v0.14.3 |
214.47 KB (🟢 -45 B) |
305.97 KB |
/blog/2015/12/04/react-js-conf-2016-diversity-scholarship |
215.34 KB (🟢 -42 B) |
306.84 KB |
/blog/2015/12/16/ismounted-antipattern |
214.94 KB (🟢 -44 B) |
306.44 KB |
/blog/2015/12/18/react-components-elements-and-instances |
218.87 KB (🟢 -46 B) |
310.37 KB |
/blog/2015/12/29/react-v0.14.4 |
214.14 KB (🟢 -45 B) |
305.64 KB |
/blog/2016/01/08/A-implies-B-does-not-imply-B-implies-A |
215.16 KB (🟢 -46 B) |
306.66 KB |
/blog/2016/01/12/discontinuing-ie8-support |
213.96 KB (🟢 -45 B) |
305.47 KB |
/blog/2016/02/19/new-versioning-scheme |
215.34 KB (🟢 -45 B) |
306.85 KB |
/blog/2016/03/07/react-v15-rc1 |
218.1 KB (🟢 -45 B) |
309.6 KB |
/blog/2016/03/16/react-v15-rc2 |
214.96 KB (🟢 -44 B) |
306.46 KB |
/blog/2016/03/29/react-v0.14.8 |
214.09 KB (🟢 -46 B) |
305.59 KB |
/blog/2016/04/07/react-v15 |
222.29 KB (🟢 -47 B) |
313.79 KB |
/blog/2016/04/08/react-v15.0.1 |
214.85 KB (🟢 -44 B) |
306.35 KB |
/blog/2016/07/11/introducing-reacts-error-code-system |
214.56 KB (🟢 -45 B) |
306.06 KB |
/blog/2016/07/13/mixins-considered-harmful |
222.72 KB (🟢 -46 B) |
314.22 KB |
/blog/2016/07/22/create-apps-with-no-configuration |
218.05 KB (🟢 -46 B) |
309.55 KB |
/blog/2016/08/05/relay-state-of-the-state |
218.09 KB (🟢 -45 B) |
309.59 KB |
/blog/2016/09/28/our-first-50000-stars |
219.53 KB (🟢 -46 B) |
311.03 KB |
/blog/2016/11/16/react-v15.4.0 |
217.49 KB (🟢 -44 B) |
308.99 KB |
/blog/2017/04/07/react-v15.5.0 |
218.05 KB (🟢 -45 B) |
309.55 KB |
/blog/2017/05/18/whats-new-in-create-react-app |
217.46 KB (🟢 -44 B) |
308.96 KB |
/blog/2017/06/13/react-v15.6.0 |
216.07 KB (🟢 -45 B) |
307.57 KB |
/blog/2017/07/26/error-handling-in-react-16 |
216.42 KB (🟢 -44 B) |
307.92 KB |
/blog/2017/09/08/dom-attributes-in-react-16 |
216.85 KB (🟢 -44 B) |
308.35 KB |
/blog/2017/09/25/react-v15.6.2 |
215.18 KB (🟢 -44 B) |
306.69 KB |
/blog/2017/09/26/react-v16.0 |
220.31 KB (🟢 -46 B) |
311.81 KB |
/blog/2017/11/28/react-v16.2.0-fragment-support |
218.23 KB (🟢 -44 B) |
309.73 KB |
/blog/2017/12/07/introducing-the-react-rfc-process |
214.76 KB (🟢 -44 B) |
306.27 KB |
/blog/2017/12/15/improving-the-repository-infrastructure |
230.56 KB (🟢 -47 B) |
322.06 KB |
/blog/2018/03/01/sneak-peek-beyond-react-16 |
214.72 KB (🟢 -45 B) |
306.22 KB |
/blog/2018/03/27/update-on-async-rendering |
219.96 KB (🟢 -46 B) |
311.46 KB |
/blog/2018/03/29/react-v-16-3 |
216.78 KB (🟢 -42 B) |
308.29 KB |
/blog/2018/05/23/react-v-16-4 |
216.92 KB (🟢 -44 B) |
308.42 KB |
/blog/2018/06/07/you-probably-dont-need-derived-state |
220.58 KB (🟢 -45 B) |
312.09 KB |
/blog/2018/08/01/react-v-16-4-2 |
215.58 KB (🟢 -45 B) |
307.08 KB |
/blog/2018/09/10/introducing-the-react-profiler |
217.19 KB (🟢 -45 B) |
308.69 KB |
/blog/2018/10/01/create-react-app-v2 |
217.66 KB (🟢 -45 B) |
309.16 KB |
/blog/2018/10/23/react-v-16-6 |
216.86 KB (🟢 -45 B) |
308.36 KB |
/blog/2018/11/13/react-conf-recap |
214.57 KB (🟢 -46 B) |
306.07 KB |
/blog/2018/11/27/react-16-roadmap |
220.77 KB (🟢 -46 B) |
312.27 KB |
/blog/2018/12/19/react-v-16-7 |
215.7 KB (🟢 -43 B) |
307.2 KB |
/blog/2019/02/06/react-v16.8.0 |
217.96 KB (🟢 -45 B) |
309.46 KB |
/blog/2019/02/23/is-react-translated-yet |
217.53 KB (🟢 -44 B) |
309.03 KB |
/blog/2019/08/08/react-v16.9.0 |
220.46 KB (🟢 -45 B) |
311.96 KB |
/blog/2019/08/15/new-react-devtools |
215.06 KB (🟢 -46 B) |
306.56 KB |
/blog/2019/10/22/react-release-channels |
216.88 KB (🟢 -43 B) |
308.38 KB |
/blog/2019/11/06/building-great-user-experiences-with-concurrent-mode-and-suspense |
221.58 KB (🟢 -45 B) |
313.08 KB |
/blog/2020/02/26/react-v16.13.0 |
217.81 KB (🟢 -45 B) |
309.31 KB |
/blog/2020/08/10/react-v17-rc |
224.08 KB (🟢 -46 B) |
315.59 KB |
/blog/all |
53.44 KB (🟢 -589 B) |
144.94 KB |
/community |
203.37 KB (🟡 +536 B) |
294.87 KB |
/community/acknowledgements |
204.56 KB (🟡 +536 B) |
296.06 KB |
/community/meet-the-team |
205.08 KB (🟡 +534 B) |
296.58 KB |
/learn |
212.07 KB (🟡 +542 B) |
303.57 KB |
/learn/add-react-to-a-website |
208.19 KB (🟡 +544 B) |
299.7 KB |
/learn/adding-interactivity |
209.99 KB (🟡 +543 B) |
301.49 KB |
/learn/choosing-the-state-structure |
215.74 KB (🟡 +541 B) |
307.24 KB |
/learn/conditional-rendering |
207.97 KB (🟡 +548 B) |
299.47 KB |
/learn/describing-the-ui |
207.17 KB (🟡 +541 B) |
298.68 KB |
/learn/editor-setup |
204.45 KB (🟡 +541 B) |
295.95 KB |
/learn/escape-hatches |
202.69 KB (🟡 +540 B) |
294.19 KB |
/learn/extracting-state-logic-into-a-reducer |
213.34 KB (🟡 +547 B) |
304.84 KB |
/learn/importing-and-exporting-components |
206.36 KB (🟡 +540 B) |
297.86 KB |
/learn/installation |
204.01 KB (🟡 +543 B) |
295.52 KB |
/learn/javascript-in-jsx-with-curly-braces |
206.44 KB (🟡 +544 B) |
297.94 KB |
/learn/keeping-components-pure |
210.59 KB (🟡 +561 B) |
302.09 KB |
/learn/managing-state |
209.29 KB (🟡 +537 B) |
300.79 KB |
/learn/manipulating-the-dom-with-refs |
211.21 KB (🟡 +543 B) |
302.71 KB |
/learn/passing-data-deeply-with-context |
210.72 KB (🟡 +543 B) |
302.22 KB |
/learn/passing-props-to-a-component |
210.15 KB (🟡 +545 B) |
301.65 KB |
/learn/preserving-and-resetting-state |
212.96 KB (🟡 +544 B) |
304.46 KB |
/learn/queueing-a-series-of-state-updates |
207.93 KB (🟡 +538 B) |
299.43 KB |
/learn/react-developer-tools |
203.89 KB (🟡 +541 B) |
295.39 KB |
/learn/reacting-to-input-with-state |
212.42 KB (🟡 +554 B) |
303.92 KB |
/learn/referencing-values-with-refs |
209.46 KB (🟡 +544 B) |
300.96 KB |
/learn/render-and-commit |
206.43 KB (🟡 +541 B) |
297.93 KB |
/learn/rendering-lists |
210.5 KB (🟡 +544 B) |
302 KB |
/learn/responding-to-events |
209.49 KB (🟡 +541 B) |
300.99 KB |
/learn/scaling-up-with-reducer-and-context |
207.51 KB (🟡 +543 B) |
299.02 KB |
/learn/sharing-state-between-components |
208.22 KB (🟡 +540 B) |
299.72 KB |
/learn/start-a-new-react-project |
204.87 KB (🟡 +545 B) |
296.37 KB |
/learn/state-a-components-memory |
213.67 KB (🟡 +544 B) |
305.17 KB |
/learn/state-as-a-snapshot |
207.48 KB (🟡 +543 B) |
298.98 KB |
/learn/thinking-in-react |
209.37 KB (🟡 +539 B) |
300.87 KB |
/learn/updating-arrays-in-state |
211.56 KB (🟡 +541 B) |
303.06 KB |
/learn/updating-objects-in-state |
211.27 KB (🟡 +547 B) |
302.78 KB |
/learn/writing-markup-with-jsx |
206.37 KB (🟡 +543 B) |
297.87 KB |
/learn/your-first-component |
207.27 KB (🟡 +544 B) |
298.77 KB |
/reference |
203.32 KB (🟡 +529 B) |
294.82 KB |
/reference/reactdom |
203.47 KB (🟡 +535 B) |
294.97 KB |
/reference/render |
204.81 KB (🟡 +537 B) |
296.31 KB |
/reference/usestate |
211.29 KB (🟡 +537 B) |
302.79 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.
Parvezkhan0
reviewed
Jun 9, 2025
Comment on lines
+25
to
+30
| } | ||
|
|
||
| var preferredTheme; | ||
| try { | ||
| preferredTheme = localStorage.getItem('theme'); | ||
| } catch (err) { } |
There was a problem hiding this comment.
Just spotted duplicate variable declarations in _document.tsx around lines 25–30 (two var preferredTheme; and two var initialTheme = preferredTheme;). Cleaning those up would tidy the code. Otherwise, LGTM!
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This should enable the new streaming renderer, which will let use Suspense for code splitting. (reactwg/react-18#37)
https://nextjs.org/blog/next-12#server-side-streaming
Note this also opts us into using the Edge Runtime. (It's confusing that it's coupled in Next.js but the options will likely be decoupled later.)
Let's give it a spin! Might be nice if we find some SSR bugs with this.