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[17.0.2] Aggressive cleanup to assist garbage collection #2

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[17.0.2] Aggressive cleanup to assist garbage collection #2

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8319220
clear stateNode
paulshen Aug 2, 2021
f959042
detach fiber from host component
paulshen Aug 2, 2021
67a1cd3
apply to ReactFiberCommitWork.old.js
paulshen Aug 3, 2021
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8 changes: 5 additions & 3 deletions packages/react-dom/src/client/ReactDOMComponentTree.js
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Original file line number Diff line number Diff line change
Expand Up @@ -33,9 +33,11 @@ import {getParentSuspenseInstance} from './ReactDOMHostConfig';
import invariant from 'shared/invariant';
import {enableScopeAPI} from 'shared/ReactFeatureFlags';

const randomKey = Math.random()
.toString(36)
.slice(2);
// const randomKey = Math.random()
// .toString(36)
// .slice(2);
// HACK: not so random anymore
const randomKey = '';
const internalInstanceKey = '__reactFiber$' + randomKey;
const internalPropsKey = '__reactProps$' + randomKey;
const internalContainerInstanceKey = '__reactContainer$' + randomKey;
Expand Down
49 changes: 34 additions & 15 deletions packages/react-reconciler/src/ReactFiberCommitWork.new.js
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Original file line number Diff line number Diff line change
Expand Up @@ -1044,7 +1044,7 @@ function commitUnmount(
} while (effect !== firstEffect);
}
}
return;
break;
}
case ClassComponent: {
safelyDetachRef(current, nearestMountedAncestor);
Expand All @@ -1056,11 +1056,28 @@ function commitUnmount(
nearestMountedAncestor,
);
}
return;
break;
}
case HostComponent: {
safelyDetachRef(current, nearestMountedAncestor);
return;
// HACK: detach fiber references from DOM
current.stateNode.__reactFiber$ = null;
current.stateNode.__reactProps$ = null;
current.stateNode.__reactContainer$ = null;
current.stateNode.__reactEvents$ = null;
current.stateNode.__reactListeners$ = null;
current.stateNode.__reactHandles$ = null;
break;
}
case HostText: {
// HACK: detach fiber references from DOM
current.stateNode.__reactFiber$ = null;
current.stateNode.__reactProps$ = null;
current.stateNode.__reactContainer$ = null;
current.stateNode.__reactEvents$ = null;
current.stateNode.__reactListeners$ = null;
current.stateNode.__reactHandles$ = null;
break;
}
case HostPortal: {
// TODO: this is recursive.
Expand All @@ -1076,7 +1093,7 @@ function commitUnmount(
} else if (supportsPersistence) {
emptyPortalContainer(current);
}
return;
break;
}
case FundamentalComponent: {
if (enableFundamentalAPI) {
Expand All @@ -1086,7 +1103,7 @@ function commitUnmount(
current.stateNode = null;
}
}
return;
break;
}
case DehydratedFragment: {
if (enableSuspenseCallback) {
Expand All @@ -1098,15 +1115,21 @@ function commitUnmount(
}
}
}
return;
break;
}
case ScopeComponent: {
if (enableScopeAPI) {
safelyDetachRef(current, nearestMountedAncestor);
}
return;
break;
}
}

// Remove reference for GC
current.stateNode = null;
if (current.alternate != null) {
current.alternate.stateNode = null;
}
}

function commitNestedUnmounts(
Expand Down Expand Up @@ -1460,6 +1483,8 @@ function unmountHostComponents(
}

if (node.tag === HostComponent || node.tag === HostText) {
// Save stateNode reference so commitUnmount can clear it.
const stateNode: Instance | TextInstance = node.stateNode;
commitNestedUnmounts(
finishedRoot,
node,
Expand All @@ -1469,15 +1494,9 @@ function unmountHostComponents(
// After all the children have unmounted, it is now safe to remove the
// node from the tree.
if (currentParentIsContainer) {
removeChildFromContainer(
((currentParent: any): Container),
(node.stateNode: Instance | TextInstance),
);
removeChildFromContainer(((currentParent: any): Container), stateNode);
} else {
removeChild(
((currentParent: any): Instance),
(node.stateNode: Instance | TextInstance),
);
removeChild(((currentParent: any): Instance), stateNode);
}
// Don't visit children because we already visited them.
} else if (enableFundamentalAPI && node.tag === FundamentalComponent) {
Expand Down
49 changes: 34 additions & 15 deletions packages/react-reconciler/src/ReactFiberCommitWork.old.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -906,19 +906,36 @@ function commitUnmount(
} while (effect !== firstEffect);
}
}
return;
break;
}
case ClassComponent: {
safelyDetachRef(current);
const instance = current.stateNode;
if (typeof instance.componentWillUnmount === 'function') {
safelyCallComponentWillUnmount(current, instance);
}
return;
break;
}
case HostComponent: {
safelyDetachRef(current);
return;
// HACK: detach fiber references from DOM
current.stateNode.__reactFiber$ = null;
current.stateNode.__reactProps$ = null;
current.stateNode.__reactContainer$ = null;
current.stateNode.__reactEvents$ = null;
current.stateNode.__reactListeners$ = null;
current.stateNode.__reactHandles$ = null;
break;
}
case HostText: {
// HACK: detach fiber references from DOM
current.stateNode.__reactFiber$ = null;
current.stateNode.__reactProps$ = null;
current.stateNode.__reactContainer$ = null;
current.stateNode.__reactEvents$ = null;
current.stateNode.__reactListeners$ = null;
current.stateNode.__reactHandles$ = null;
break;
}
case HostPortal: {
// TODO: this is recursive.
Expand All @@ -929,7 +946,7 @@ function commitUnmount(
} else if (supportsPersistence) {
emptyPortalContainer(current);
}
return;
break;
}
case FundamentalComponent: {
if (enableFundamentalAPI) {
Expand All @@ -939,7 +956,7 @@ function commitUnmount(
current.stateNode = null;
}
}
return;
break;
}
case DehydratedFragment: {
if (enableSuspenseCallback) {
Expand All @@ -951,15 +968,21 @@ function commitUnmount(
}
}
}
return;
break;
}
case ScopeComponent: {
if (enableScopeAPI) {
safelyDetachRef(current);
}
return;
break;
}
}

// Remove reference for GC
current.stateNode = null;
if (current.alternate != null) {
current.alternate.stateNode = null;
}
}

function commitNestedUnmounts(
Expand Down Expand Up @@ -1314,19 +1337,15 @@ function unmountHostComponents(
}

if (node.tag === HostComponent || node.tag === HostText) {
// Save stateNode reference so commitUnmount can clear it.
const stateNode: Instance | TextInstance = node.stateNode;
commitNestedUnmounts(finishedRoot, node, renderPriorityLevel);
// After all the children have unmounted, it is now safe to remove the
// node from the tree.
if (currentParentIsContainer) {
removeChildFromContainer(
((currentParent: any): Container),
(node.stateNode: Instance | TextInstance),
);
removeChildFromContainer(((currentParent: any): Container), stateNode);
} else {
removeChild(
((currentParent: any): Instance),
(node.stateNode: Instance | TextInstance),
);
removeChild(((currentParent: any): Instance), stateNode);
}
// Don't visit children because we already visited them.
} else if (enableFundamentalAPI && node.tag === FundamentalComponent) {
Expand Down
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