[Fizz] Pipeable Stream Perf #24291
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[Fizz] Pipeable Stream Perf #24291
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Comparing: ec52a56...4fd4f93 Critical size changesIncludes critical production bundles, as well as any change greater than 2%:
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sebmarkbage
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Apr 7, 2022
sebmarkbage
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Apr 7, 2022
packages/react-server-native-relay/src/__tests__/ReactFlightNativeRelay-test.internal.js
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acdlite
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Apr 7, 2022
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This comment was scratch for capturing some performance timings (code that does not show up in any of the commits currently in this PR). I'll leave it here for clarity's sake but it should be disregarded.
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Yeah. I'll add it to the list for follow-ups. For now you can inspect the output HTML to see what they do. |
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… renderToPipeableStream Modified from ssr2 and https://github.com/SuperOleg39/react-ssr-perf-test
The previous implementation of pipeable streaming (Node) suffered some performance issues brought about by the high chunk counts and innefficiencies with how node streams handle this situation. In particular the use of cork/uncork was meant to alleviate this but these methods do not do anything unless the receiving Writable Stream implements _writev which many won't. This change adopts the view based buffering techniques previously implemented for the Browser execution context. The main difference is the use of backpressure provided by the writable stream which is not implementable in the other context. Another change to note is the use of standards constructs like TextEncoder and TypedArrays.
encodeInto allows us to write directly to the view buffer that will end up getting streamed instead of encoding into an intermediate buffer and then copying that data.
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What do pw and fcq mean? |
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I think I'll delete that comment. it was performance.now timings for If you look in the main description you will see more broad based network results from autocannon which is more real-world |
gnoff
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Apr 8, 2022
| @@ -437,6 +437,7 @@ const bundles = [ | |||
| 'ReactFlightNativeRelayServerIntegration', | |||
| 'JSResourceReferenceImpl', | |||
| 'ReactNativeInternalFeatureFlags', | |||
| 'util', | |||
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@sebmarkbage you commented that this should not be necessary. In practice the build fails without this so I assume ReactServerStreamConfigNode.js is getting pulled in by accident or something changed and now that is the expected file
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The React sync for React Native is currently failing because "util could not be found", I confirmed #24322 fixes it, how can we get it landed?
sebmarkbage
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Apr 9, 2022
rickhanlonii
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Apr 13, 2022
* Add fixture for comparing baseline render perf for renderToString and renderToPipeableStream Modified from ssr2 and https://github.com/SuperOleg39/react-ssr-perf-test * Implement buffering in pipeable streams The previous implementation of pipeable streaming (Node) suffered some performance issues brought about by the high chunk counts and innefficiencies with how node streams handle this situation. In particular the use of cork/uncork was meant to alleviate this but these methods do not do anything unless the receiving Writable Stream implements _writev which many won't. This change adopts the view based buffering techniques previously implemented for the Browser execution context. The main difference is the use of backpressure provided by the writable stream which is not implementable in the other context. Another change to note is the use of standards constructs like TextEncoder and TypedArrays. * Implement encodeInto during flushCompletedQueues encodeInto allows us to write directly to the view buffer that will end up getting streamed instead of encoding into an intermediate buffer and then copying that data.
rickhanlonii
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Apr 14, 2022
* Add fixture for comparing baseline render perf for renderToString and renderToPipeableStream Modified from ssr2 and https://github.com/SuperOleg39/react-ssr-perf-test * Implement buffering in pipeable streams The previous implementation of pipeable streaming (Node) suffered some performance issues brought about by the high chunk counts and innefficiencies with how node streams handle this situation. In particular the use of cork/uncork was meant to alleviate this but these methods do not do anything unless the receiving Writable Stream implements _writev which many won't. This change adopts the view based buffering techniques previously implemented for the Browser execution context. The main difference is the use of backpressure provided by the writable stream which is not implementable in the other context. Another change to note is the use of standards constructs like TextEncoder and TypedArrays. * Implement encodeInto during flushCompletedQueues encodeInto allows us to write directly to the view buffer that will end up getting streamed instead of encoding into an intermediate buffer and then copying that data.
zhengjitf
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Apr 15, 2022
* Add fixture for comparing baseline render perf for renderToString and renderToPipeableStream Modified from ssr2 and https://github.com/SuperOleg39/react-ssr-perf-test * Implement buffering in pipeable streams The previous implementation of pipeable streaming (Node) suffered some performance issues brought about by the high chunk counts and innefficiencies with how node streams handle this situation. In particular the use of cork/uncork was meant to alleviate this but these methods do not do anything unless the receiving Writable Stream implements _writev which many won't. This change adopts the view based buffering techniques previously implemented for the Browser execution context. The main difference is the use of backpressure provided by the writable stream which is not implementable in the other context. Another change to note is the use of standards constructs like TextEncoder and TypedArrays. * Implement encodeInto during flushCompletedQueues encodeInto allows us to write directly to the view buffer that will end up getting streamed instead of encoding into an intermediate buffer and then copying that data.
rickhanlonii
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that referenced
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Apr 19, 2022
* Add fixture for comparing baseline render perf for renderToString and renderToPipeableStream Modified from ssr2 and https://github.com/SuperOleg39/react-ssr-perf-test * Implement buffering in pipeable streams The previous implementation of pipeable streaming (Node) suffered some performance issues brought about by the high chunk counts and innefficiencies with how node streams handle this situation. In particular the use of cork/uncork was meant to alleviate this but these methods do not do anything unless the receiving Writable Stream implements _writev which many won't. This change adopts the view based buffering techniques previously implemented for the Browser execution context. The main difference is the use of backpressure provided by the writable stream which is not implementable in the other context. Another change to note is the use of standards constructs like TextEncoder and TypedArrays. * Implement encodeInto during flushCompletedQueues encodeInto allows us to write directly to the view buffer that will end up getting streamed instead of encoding into an intermediate buffer and then copying that data.
facebook-github-bot
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Apr 26, 2022
Summary: This sync includes the following changes: - **[bd4784c8f](facebook/react@bd4784c8f )**: Revert #24236 (Don't recreate the same fallback on the client if hydrating suspends) ([#24434](facebook/react#24434)) //<dan>// - **[6d3b6d0f4](facebook/react@6d3b6d0f4 )**: forwardRef et al shouldn't affect if props reused ([#24421](facebook/react#24421)) //<Andrew Clark>// - **[bd0813766](facebook/react@bd0813766 )**: Fix: useDeferredValue should reuse previous value ([#24413](facebook/react#24413)) //<Andrew Clark>// - **[9ae80d6a2](facebook/react@9ae80d6a2 )**: Suppress hydration warnings when a preceding sibling suspends ([#24404](facebook/react#24404)) //<Josh Story>// - **[0dc4e6663](facebook/react@0dc4e6663 )**: Land enableClientRenderFallbackOnHydrationMismatch ([#24410](facebook/react#24410)) //<Andrew Clark>// - **[354772952](facebook/react@354772952 )**: Land enableSelectiveHydration flag ([#24406](facebook/react#24406)) //<Andrew Clark>// - **[392808a1f](facebook/react@392808a1f )**: Land enableClientRenderFallbackOnTextMismatch flag ([#24405](facebook/react#24405)) //<Andrew Clark>// - **[1e748b452](facebook/react@1e748b452 )**: Land enableLazyElements flag ([#24407](facebook/react#24407)) //<Andrew Clark>// - **[4175f0593](facebook/react@4175f0593 )**: Temporarily feature flag numeric fallback for symbols ([#24401](facebook/react#24401)) //<Ricky>// - **[a6d53f346](facebook/react@a6d53f346 )**: Revert "Clean up Selective Hydration / Event Replay flag ([#24156](facebook/react#24156))" ([#24402](facebook/react#24402)) //<Ricky>// - **[ab9cdd34f](facebook/react@ab9cdd34f )**: Bugfix: In legacy mode, call suspended tree's unmount effects when it is deleted ([#24400](facebook/react#24400)) //<Andrew Clark>// - **[168da8d55](facebook/react@168da8d55 )**: Fix typo that happened during rebasing //<Andrew Clark>// - **[8bc527a4c](facebook/react@8bc527a4c )**: Bugfix: Fix race condition between interleaved and non-interleaved updates ([#24353](facebook/react#24353)) //<Andrew Clark>// - **[f7cf077cc](facebook/react@f7cf077cc )**: [Transition Tracing] Add Offscreen Queue ([#24341](facebook/react#24341)) //<Luna Ruan>// - **[4fc394bbe](facebook/react@4fc394bbe )**: Fix suspense fallback throttling ([#24253](facebook/react#24253)) //<sunderls>// - **[80170a068](facebook/react@80170a068 )**: Match bundle.name and match upper case entry points ([#24346](facebook/react#24346)) //<Sebastian Markbåge>// - **[fea6f8da6](facebook/react@fea6f8da6 )**: [Transition Tracing] Add transition to OffscreenState and pendingSuspenseBoundaries to RootState ([#24340](facebook/react#24340)) //<Luna Ruan>// - **[8e2f9b086](facebook/react@8e2f9b086 )**: move passive flag ([#24339](facebook/react#24339)) //<Luna Ruan>// - **[55a21ef7e](facebook/react@55a21ef7e )**: fix pushTransition for transition tracing ([#24338](facebook/react#24338)) //<Luna Ruan>// - **[069d23bb7](facebook/react@069d23bb7 )**: [eslint-plugin-exhaustive-deps] Fix exhaustive deps check for unstable vars ([#24343](facebook/react#24343)) //<Afzal Sayed>// - **[4997515b9](facebook/react@4997515b9 )**: Point useSubscription to useSyncExternalStore shim ([#24289](facebook/react#24289)) //<dan>// - **[01e2bff1d](facebook/react@01e2bff1d )**: Remove unnecessary check ([#24332](facebook/react#24332)) //<zhoulixiang>// - **[d9a0f9e20](facebook/react@d9a0f9e20 )**: Delete create-subscription folder ([#24288](facebook/react#24288)) //<dan>// - **[f993ffc51](facebook/react@f993ffc51 )**: Fix infinite update loop that happens when an unmemoized value is passed to useDeferredValue ([#24247](facebook/react#24247)) //<Andrew Clark>// - **[fa5800226](facebook/react@fa5800226 )**: [Fizz] Pipeable Stream Perf ([#24291](facebook/react#24291)) //<Josh Story>// - **[0568c0f8c](facebook/react@0568c0f8c )**: Replace zero with NoLanes for consistency in FiberLane ([#24327](facebook/react#24327)) //<Leo>// - **[e0160d50c](facebook/react@e0160d50c )**: add transition tracing transitions stack ([#24321](facebook/react#24321)) //<Luna Ruan>// - **[b0f13e5d3](facebook/react@b0f13e5d3 )**: add pendingPassiveTransitions ([#24320](facebook/react#24320)) //<Luna Ruan>// Changelog: [General][Changed] - React Native sync for revisions 60e63b9...bd4784c jest_e2e[run_all_tests] Reviewed By: kacieb Differential Revision: D35899012 fbshipit-source-id: 86a885e336fca9f0efa80cd2b8ca040f2cb53853
This was referenced Mar 4, 2023
This was referenced Feb 10, 2024
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drawing heavily from #24034 this PR should improve performance of renderToPipeableStream.
This PR implements a TypedArray buffer that text is encoded into while writing chunks to the stream. It also adds a fixture which is useful for comparing the baseline rendering performance of renderToPipeableStream and renderToString.
If you want to test out the current implementation simply visit the first commit.
The second commit includes an analog of the buffer which does encoding during the performWork step.
The third commit includes a change to adopt encodeInto which delivers some performance gains by avoiding extra mem copies.
Fixture Performance
The following stats were gathered with
npx autocannon -c 5 -d 30 http://localhost:4000/{stream|string} --renderStatusCodes --excludeErrorStatsBefore Change
buffering stream chunks
encodeInto