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Lower Suspense throttling heuristic to 300ms (#26803)
Now that the throttling mechanism applies more often, we've decided to lower this a tad to ensure it's not noticeable. The idea is it should be just large enough to prevent jank when lots of different parts of the UI load in rapid succession, but not large enough to make the UI feel sluggish. There's no perfect number, it's just a heuristic. DiffTrain build for commit f8de255.
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13 files changed

+43
-43
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13 files changed

+43
-43
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‎compiled-rn/facebook-fbsource/xplat/js/RKJSModules/vendor/react-test-renderer/cjs/ReactTestRenderer-dev.js‎

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@@ -7,7 +7,7 @@
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* @noflow
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* @nolint
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* @preventMunge
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* @generated SignedSource<<1559e1781d2b4f77a1b869cc6a27b095>>
10+
* @generated SignedSource<<ca59e5754dbc2396cdc2b7d218cedd13>>
1111
*/
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'use strict';
@@ -20014,7 +20014,7 @@ var workInProgressRootRecoverableErrors = null; // The most recent time we eithe
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// TODO: Think of a better name for this variable?
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var globalMostRecentFallbackTime = 0;
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var FALLBACK_THROTTLE_MS = 500; // The absolute time for when we should start giving up on rendering
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var FALLBACK_THROTTLE_MS = 300; // The absolute time for when we should start giving up on rendering
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// more and prefer CPU suspense heuristics instead.
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var workInProgressRootRenderTargetTime = Infinity; // How long a render is supposed to take before we start following CPU
@@ -23930,7 +23930,7 @@ function createFiberRoot(
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return root;
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}
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var ReactVersion = "18.3.0-canary-4bfcd02b2-20230516";
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var ReactVersion = "18.3.0-canary-f8de255e9-20230516";
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// Might add PROFILE later.
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‎compiled-rn/facebook-fbsource/xplat/js/RKJSModules/vendor/react-test-renderer/cjs/ReactTestRenderer-prod.js‎

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* @noflow
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* @nolint
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* @preventMunge
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* @generated SignedSource<<668f9e223a7ddfa69caac2f6094e95b5>>
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* @generated SignedSource<<bf297dad702ba511975b518d639aa865>>
1111
*/
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"use strict";
@@ -6544,7 +6544,7 @@ function performConcurrentWorkOnRoot(root, didTimeout) {
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}
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if (
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(lanes & 125829120) === lanes &&
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((didTimeout = globalMostRecentFallbackTime + 500 - now()),
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((didTimeout = globalMostRecentFallbackTime + 300 - now()),
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10 < didTimeout)
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) {
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markRootSuspended(root, lanes);
@@ -7457,7 +7457,7 @@ function pingSuspendedRoot(root, wakeable, pingedLanes) {
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(3 === workInProgressRootExitStatus &&
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(workInProgressRootRenderLanes & 125829120) ===
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workInProgressRootRenderLanes &&
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500 > now() - globalMostRecentFallbackTime)
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300 > now() - globalMostRecentFallbackTime)
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? 0 === (executionContext & 2) && prepareFreshStack(root, 0)
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: (workInProgressRootPingedLanes |= pingedLanes));
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ensureRootIsScheduled(root);
@@ -8617,7 +8617,7 @@ var devToolsConfig$jscomp$inline_1036 = {
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throw Error("TestRenderer does not support findFiberByHostInstance()");
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},
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bundleType: 0,
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version: "18.3.0-canary-4bfcd02b2-20230516",
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version: "18.3.0-canary-f8de255e9-20230516",
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rendererPackageName: "react-test-renderer"
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};
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var internals$jscomp$inline_1235 = {
@@ -8648,7 +8648,7 @@ var internals$jscomp$inline_1235 = {
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scheduleRoot: null,
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setRefreshHandler: null,
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getCurrentFiber: null,
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reconcilerVersion: "18.3.0-canary-4bfcd02b2-20230516"
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reconcilerVersion: "18.3.0-canary-f8de255e9-20230516"
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};
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if ("undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__) {
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var hook$jscomp$inline_1236 = __REACT_DEVTOOLS_GLOBAL_HOOK__;

‎compiled-rn/facebook-fbsource/xplat/js/RKJSModules/vendor/react-test-renderer/cjs/ReactTestRenderer-profiling.js‎

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* @noflow
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* @nolint
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* @preventMunge
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* @generated SignedSource<<cc785859fee2463cf14fc2b5e4b075cb>>
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* @generated SignedSource<<a9469d90e2f55f1395287b11b0eee96e>>
1111
*/
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"use strict";
@@ -6884,7 +6884,7 @@ function performConcurrentWorkOnRoot(root, didTimeout) {
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}
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if (
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(lanes & 125829120) === lanes &&
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((didTimeout = globalMostRecentFallbackTime + 500 - now$1()),
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((didTimeout = globalMostRecentFallbackTime + 300 - now$1()),
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10 < didTimeout)
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) {
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markRootSuspended(root, lanes);
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(3 === workInProgressRootExitStatus &&
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(workInProgressRootRenderLanes & 125829120) ===
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workInProgressRootRenderLanes &&
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500 > now$1() - globalMostRecentFallbackTime)
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300 > now$1() - globalMostRecentFallbackTime)
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? 0 === (executionContext & 2) && prepareFreshStack(root, 0)
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: (workInProgressRootPingedLanes |= pingedLanes));
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ensureRootIsScheduled(root);
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throw Error("TestRenderer does not support findFiberByHostInstance()");
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},
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bundleType: 0,
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version: "18.3.0-canary-4bfcd02b2-20230516",
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version: "18.3.0-canary-f8de255e9-20230516",
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rendererPackageName: "react-test-renderer"
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};
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var internals$jscomp$inline_1276 = {
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scheduleRoot: null,
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setRefreshHandler: null,
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getCurrentFiber: null,
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reconcilerVersion: "18.3.0-canary-4bfcd02b2-20230516"
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reconcilerVersion: "18.3.0-canary-f8de255e9-20230516"
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};
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if ("undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__) {
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var hook$jscomp$inline_1277 = __REACT_DEVTOOLS_GLOBAL_HOOK__;

‎compiled-rn/facebook-fbsource/xplat/js/RKJSModules/vendor/react/cjs/React-dev.js‎

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@@ -27,7 +27,7 @@ if (
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}
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"use strict";
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var ReactVersion = "18.3.0-canary-4bfcd02b2-20230516";
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var ReactVersion = "18.3.0-canary-f8de255e9-20230516";
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// ATTENTION
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// When adding new symbols to this file,

‎compiled-rn/facebook-fbsource/xplat/js/RKJSModules/vendor/react/cjs/React-prod.js‎

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);
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};
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exports.useTransition = useTransition;
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exports.version = "18.3.0-canary-4bfcd02b2-20230516";
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exports.version = "18.3.0-canary-f8de255e9-20230516";

‎compiled-rn/facebook-fbsource/xplat/js/RKJSModules/vendor/react/cjs/React-profiling.js‎

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);
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};
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exports.useTransition = useTransition;
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exports.version = "18.3.0-canary-4bfcd02b2-20230516";
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exports.version = "18.3.0-canary-f8de255e9-20230516";
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/* global __REACT_DEVTOOLS_GLOBAL_HOOK__ */
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if (

‎compiled-rn/facebook-fbsource/xplat/js/react-native-github/Libraries/Renderer/REVISION‎

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@@ -1 +1 @@
1-
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f8de255e94540f9018d8196b3a34da500707c39b

‎compiled-rn/facebook-fbsource/xplat/js/react-native-github/Libraries/Renderer/implementations/ReactFabric-dev.fb.js‎

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Original file line numberDiff line numberDiff line change
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* @noflow
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* @nolint
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* @preventMunge
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* @generated SignedSource<<dbadfcacc21c727a10f473c6628dc518>>
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* @generated SignedSource<<130672a53893af8813c0dcaa40c799e0>>
1111
*/
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'use strict';
@@ -23119,7 +23119,7 @@ var workInProgressRootRecoverableErrors = null; // The most recent time we eithe
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// TODO: Think of a better name for this variable?
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var globalMostRecentFallbackTime = 0;
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var FALLBACK_THROTTLE_MS = 500; // The absolute time for when we should start giving up on rendering
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var FALLBACK_THROTTLE_MS = 300; // The absolute time for when we should start giving up on rendering
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// more and prefer CPU suspense heuristics instead.
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var workInProgressRootRenderTargetTime = Infinity; // How long a render is supposed to take before we start following CPU
@@ -27246,7 +27246,7 @@ function createFiberRoot(
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return root;
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}
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var ReactVersion = "18.3.0-canary-4e8bd686";
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var ReactVersion = "18.3.0-canary-4ecba8f8";
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function createPortal$1(
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children,

‎compiled-rn/facebook-fbsource/xplat/js/react-native-github/Libraries/Renderer/implementations/ReactFabric-prod.fb.js‎

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Original file line numberDiff line numberDiff line change
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* @noflow
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* @nolint
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* @preventMunge
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* @generated SignedSource<<1129f51d0ce56db855259eecc041cfb0>>
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* @generated SignedSource<<d827ef8b6ab7cd5a32a962f196664c2a>>
1111
*/
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"use strict";
@@ -7671,7 +7671,7 @@ function performConcurrentWorkOnRoot(root, didTimeout) {
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if (
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(lanes & 125829120) === lanes &&
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(alwaysThrottleRetries || 3 === exitStatus) &&
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((exitStatus = globalMostRecentFallbackTime + 500 - now()),
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((exitStatus = globalMostRecentFallbackTime + 300 - now()),
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10 < exitStatus)
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) {
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markRootSuspended(root, lanes);
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(3 === workInProgressRootExitStatus &&
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(workInProgressRootRenderLanes & 125829120) ===
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workInProgressRootRenderLanes &&
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500 > now() - globalMostRecentFallbackTime)
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300 > now() - globalMostRecentFallbackTime)
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? 0 === (executionContext & 2) && prepareFreshStack(root, 0)
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: (workInProgressRootPingedLanes |= pingedLanes));
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ensureRootIsScheduled(root);
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devToolsConfig$jscomp$inline_1061 = {
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findFiberByHostInstance: getInstanceFromNode,
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bundleType: 0,
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version: "18.3.0-canary-2c90a59e",
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version: "18.3.0-canary-765a5f8c",
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rendererPackageName: "react-native-renderer",
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rendererConfig: {
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getInspectorDataForViewTag: function () {
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scheduleRoot: null,
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setRefreshHandler: null,
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getCurrentFiber: null,
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reconcilerVersion: "18.3.0-canary-2c90a59e"
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reconcilerVersion: "18.3.0-canary-765a5f8c"
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};
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if ("undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__) {
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var hook$jscomp$inline_1300 = __REACT_DEVTOOLS_GLOBAL_HOOK__;

‎compiled-rn/facebook-fbsource/xplat/js/react-native-github/Libraries/Renderer/implementations/ReactFabric-profiling.fb.js‎

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Original file line numberDiff line numberDiff line change
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* @noflow
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* @nolint
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* @preventMunge
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* @generated SignedSource<<b2b07ccb72570d4ed30285fdbc7b6def>>
10+
* @generated SignedSource<<7478d1d49796ffd4357806e824bae4e5>>
1111
*/
1212

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if (
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(lanes & 125829120) === lanes &&
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(alwaysThrottleRetries || 3 === exitStatus) &&
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((exitStatus = globalMostRecentFallbackTime + 500 - now$1()),
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((exitStatus = globalMostRecentFallbackTime + 300 - now$1()),
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10 < exitStatus)
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) {
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(3 === workInProgressRootExitStatus &&
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(workInProgressRootRenderLanes & 125829120) ===
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workInProgressRootRenderLanes &&
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500 > now$1() - globalMostRecentFallbackTime)
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300 > now$1() - globalMostRecentFallbackTime)
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? 0 === (executionContext & 2) && prepareFreshStack(root, 0)
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devToolsConfig$jscomp$inline_1139 = {
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findFiberByHostInstance: getInstanceFromNode,
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bundleType: 0,
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version: "18.3.0-canary-a6509f52",
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version: "18.3.0-canary-065b86a1",
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rendererPackageName: "react-native-renderer",
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rendererConfig: {
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getInspectorDataForViewTag: function () {
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scheduleRoot: null,
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setRefreshHandler: null,
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getCurrentFiber: null,
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reconcilerVersion: "18.3.0-canary-a6509f52"
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reconcilerVersion: "18.3.0-canary-065b86a1"
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});
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exports.createPortal = function (children, containerTag) {
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return createPortal$1(

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