perf: remove PureReportActionItem and use stable report

src/components/MoneyRequestReportView/MoneyRequestReportActionsList.tsx

@@ -22,6 +22,7 @@ import useReportScrollManager from '@hooks/useReportScrollManager';
 import useReportTransactionsCollection from '@hooks/useReportTransactionsCollection';
 import useResponsiveLayoutOnWideRHP from '@hooks/useResponsiveLayoutOnWideRHP';
 import useScrollToEndOnNewMessageReceived from '@hooks/useScrollToEndOnNewMessageReceived';
+import useStableReportForReportActionItem from '@hooks/useStableReportForReportActionItem';
 import useThemeStyles from '@hooks/useThemeStyles';
 import useWindowDimensions from '@hooks/useWindowDimensions';
 import {isConsecutiveChronosAutomaticTimerAction} from '@libs/ChronosUtils';
@@ -51,6 +52,7 @@ import Visibility from '@libs/Visibility';
 import isSearchTopmostFullScreenRoute from '@navigation/helpers/isSearchTopmostFullScreenRoute';
 import FloatingMessageCounter from '@pages/inbox/report/FloatingMessageCounter';
 import getInitialNumToRender from '@pages/inbox/report/getInitialNumReportActionsToRender';
+import ReportActionIndexContext from '@pages/inbox/report/ReportActionIndexContext';
 import ReportActionsListItemRenderer from '@pages/inbox/report/ReportActionsListItemRenderer';
 import {getUnreadMarkerReportAction} from '@pages/inbox/report/shouldDisplayNewMarkerOnReportAction';
 import useReportUnreadMessageScrollTracking from '@pages/inbox/report/useReportUnreadMessageScrollTracking';
@@ -99,6 +101,8 @@ function MoneyRequestReportActionsList({onLayout}: MoneyRequestReportListProps)
     // Self-subscribe to report, policy, metadata, actions, transactions
     // report is guaranteed to exist — callers only render this component when report is loaded
     const [report] = useOnyx(`${ONYXKEYS.COLLECTION.REPORT}${reportIDFromRoute}`) as unknown as [OnyxTypes.Report];
+    // Stable reference of `report` for action items
+    const reportStable = useStableReportForReportActionItem(report);
     const [policy] = useOnyx(`${ONYXKEYS.COLLECTION.POLICY}${getNonEmptyStringOnyxID(report?.policyID)}`);
     const [reportLoadingState] = useOnyx(`${ONYXKEYS.COLLECTION.RAM_ONLY_REPORT_LOADING_STATE}${reportIDFromRoute}`);
     const [reportPaginationState] = useOnyx(`${ONYXKEYS.COLLECTION.REPORT_PAGINATION_STATE}${reportIDFromRoute}`);
@@ -559,34 +563,35 @@ function MoneyRequestReportActionsList({onLayout}: MoneyRequestReportListProps)
                 !isConsecutiveChronosAutomaticTimerAction(visibleReportActions, index, chatIncludesChronosWithID(reportAction?.reportID), isOffline) &&
                 hasNextActionMadeBySameActor(visibleReportActions, index, isOffline);
 
-            const originalReportID = getOriginalReportID(report?.reportID, reportAction, reportActionsObject);
+            const originalReportID = getOriginalReportID(reportStable?.reportID, reportAction, reportActionsObject);
 
             return (
-                <ReportActionsListItemRenderer
-                    reportAction={reportAction}
-                    parentReportAction={parentReportAction}
-                    parentReportActionForTransactionThread={EmptyParentReportActionForTransactionThread}
-                    index={index}
-                    report={report}
-                    transactionThreadReport={transactionThreadReport}
-                    displayAsGroup={displayAsGroup}
-                    shouldDisplayNewMarker={reportAction.reportActionID === unreadMarkerReportActionID}
-                    shouldDisplayReplyDivider={visibleReportActions.length > 1}
-                    isFirstVisibleReportAction={firstVisibleReportActionID === reportAction.reportActionID}
-                    shouldHideThreadDividerLine
-                    linkedReportActionID={linkedReportActionID}
-                    personalDetails={personalDetails}
-                    originalReportID={originalReportID}
-                    isReportArchived={isReportArchived}
-                    isHarvestCreatedExpenseReport={shouldShowHarvestCreatedAction}
-                />
+                <ReportActionIndexContext.Provider value={index}>
+                    <ReportActionsListItemRenderer
+                        reportAction={reportAction}
+                        parentReportAction={parentReportAction}
+                        parentReportActionForTransactionThread={EmptyParentReportActionForTransactionThread}
+                        report={reportStable}
+                        transactionThreadReport={transactionThreadReport}
+                        displayAsGroup={displayAsGroup}
+                        shouldDisplayNewMarker={reportAction.reportActionID === unreadMarkerReportActionID}
+                        shouldDisplayReplyDivider={visibleReportActions.length > 1}
+                        isFirstVisibleReportAction={firstVisibleReportActionID === reportAction.reportActionID}
+                        shouldHideThreadDividerLine
+                        linkedReportActionID={linkedReportActionID}
+                        personalDetails={personalDetails}
+                        originalReportID={originalReportID}
+                        isReportArchived={isReportArchived}
+                        isHarvestCreatedExpenseReport={shouldShowHarvestCreatedAction}
+                    />
+                </ReportActionIndexContext.Provider>
             );
         },
         [
             visibleReportActions,
             reportActionsObject,
             parentReportAction,
-            report,
+            reportStable,
             isOffline,
             transactionThreadReport,
             unreadMarkerReportActionID,

src/components/Search/SearchList/ListItem/ChatListItem.tsx

@@ -79,10 +79,8 @@ function ChatListItem<TItem extends ListItem>({
                 parentReportAction={undefined}
                 displayAsGroup={false}
                 shouldDisplayNewMarker={false}
-                index={item.index ?? 0}
                 isFirstVisibleReportAction={false}
                 shouldDisplayContextMenu={false}
-                shouldShowDraftMessage={false}
                 shouldShowBorder
                 personalDetails={personalDetails}
             />

src/hooks/useStableReportActionForReportActionItem.ts

@@ -0,0 +1,109 @@
+import {useMemo} from 'react';
+import {getOriginalMessage} from '@libs/ReportActionsUtils';
+import type {ReportAction} from '@src/types/onyx';
+
+/**
+ * Stable `ReportAction` projection for the `ReportActionItem` subtree, with `originalMessage` precomputed.
+ * Per-field `useMemo` deps so the ref holds when consumed fields are unchanged.
+ * Allow-list — when a descendant reads a new `reportAction.*` field, add it here.
+ */
+function useStableReportActionForReportActionItem(reportAction: ReportAction): ReportAction {
+    const reportActionID = reportAction.reportActionID;
+    const message = reportAction.message;
+    const pendingAction = reportAction.pendingAction;
+    const actionName = reportAction.actionName;
+    const errors = reportAction.errors;
+    const childCommenterCount = reportAction.childCommenterCount;
+    const linkMetadata = reportAction.linkMetadata;
+    const childReportID = reportAction.childReportID;
+    const childLastVisibleActionCreated = reportAction.childLastVisibleActionCreated;
+    const error = reportAction.error;
+    const created = reportAction.created;
+    const actorAccountID = reportAction.actorAccountID;
+    const adminAccountID = reportAction.adminAccountID;
+    const childVisibleActionCount = reportAction.childVisibleActionCount;
+    const childOldestFourAccountIDs = reportAction.childOldestFourAccountIDs;
+    const childType = reportAction.childType;
+    const person = reportAction.person;
+    const isOptimisticAction = reportAction.isOptimisticAction;
+    const delegateAccountID = reportAction.delegateAccountID;
+    const previousMessage = reportAction.previousMessage;
+    const isAttachmentWithText = reportAction.isAttachmentWithText;
+    const isOriginalReportDeleted = reportAction.isOriginalReportDeleted;
+    const childStateNum = reportAction.childStateNum;
+    const childStatusNum = reportAction.childStatusNum;
+    const childReportName = reportAction.childReportName;
+    const childManagerAccountID = reportAction.childManagerAccountID;
+    const childMoneyRequestCount = reportAction.childMoneyRequestCount;
+    const childOwnerAccountID = reportAction.childOwnerAccountID;
+
+    const originalMessage = useMemo(() => getOriginalMessage(reportAction), [reportAction]);
+
+    return useMemo(
+        () =>
+            ({
+                reportActionID,
+                message,
+                pendingAction,
+                actionName,
+                errors,
+                originalMessage,
+                childCommenterCount,
+                linkMetadata,
+                childReportID,
+                childLastVisibleActionCreated,
+                error,
+                created,
+                actorAccountID,
+                adminAccountID,
+                childVisibleActionCount,
+                childOldestFourAccountIDs,
+                childType,
+                person,
+                isOptimisticAction,
+                delegateAccountID,
+                previousMessage,
+                isAttachmentWithText,
+                isOriginalReportDeleted,
+                childStateNum,
+                childStatusNum,
+                childReportName,
+                childManagerAccountID,
+                childMoneyRequestCount,
+                childOwnerAccountID,
+            }) as ReportAction,
+        [
+            reportActionID,
+            message,
+            pendingAction,
+            actionName,
+            errors,
+            originalMessage,
+            childCommenterCount,
+            linkMetadata,
+            childReportID,
+            childLastVisibleActionCreated,
+            error,
+            created,
+            actorAccountID,
+            adminAccountID,
+            childVisibleActionCount,
+            childOldestFourAccountIDs,
+            childType,
+            person,
+            isOptimisticAction,
+            delegateAccountID,
+            previousMessage,
+            isAttachmentWithText,
+            isOriginalReportDeleted,
+            childStateNum,
+            childStatusNum,
+            childReportName,
+            childManagerAccountID,
+            childMoneyRequestCount,
+            childOwnerAccountID,
+        ],
+    );
+}
+
+export default useStableReportActionForReportActionItem;

src/hooks/useStableReportForReportActionItem.ts

@@ -0,0 +1,139 @@
+import {deepEqual} from 'fast-equals';
+import {useMemo, useState} from 'react';
+import type {OnyxEntry} from 'react-native-onyx';
+import type {Report} from '@src/types/onyx';
+
+/**
+ * Stable `Report` projection for the `ReportActionItem` subtree.
+ * Per-field `useMemo` deps so the ref holds across Onyx pushes when consumed fields are unchanged.
+ *
+ * Never add — heartbeat-style fields that update on routine activity and defeat the memo:
+ *   - lastReadTime, lastVisibleActionCreated, lastVisibleActionLastModified
+ *   - lastMessageText, lastMessageHtml
+ *   - lastActorAccountID, lastActionType
+ *
+ */
+function useStableReportForReportActionItem(report: OnyxEntry<Report>): OnyxEntry<Report> {
+    const reportID = report?.reportID;
+    const chatReportID = report?.chatReportID;
+    const isWaitingOnBankAccount = report?.isWaitingOnBankAccount;
+
+    // Stabilize `permissions` by content
+    const permissionsRaw = report?.permissions;
+    const [permissions, setPermissions] = useState(permissionsRaw);
+    if (!deepEqual(permissions, permissionsRaw)) {
+        setPermissions(permissionsRaw);
+    }
+
+    const policyID = report?.policyID;
+    const ownerAccountID = report?.ownerAccountID;
+    const parentReportID = report?.parentReportID;
+    const parentReportActionID = report?.parentReportActionID;
+    const type = report?.type;
+    const chatType = report?.chatType;
+    const stateNum = report?.stateNum;
+    const statusNum = report?.statusNum;
+    const isDeletedParentAction = report?.isDeletedParentAction;
+    const pendingFields = report?.pendingFields;
+    const participants = report?.participants;
+    const errorFields = report?.errorFields;
+    const reportName = report?.reportName;
+    const description = report?.description;
+    // Coerce sentinel `0` to `undefined`. The backend ships `managerID: 0` on chat reports without a manager, and a later push removes the key entirely; treating both as `undefined` keeps the memo dep stable through that reconciliation.
+    // eslint-disable-next-line @typescript-eslint/prefer-nullish-coalescing
+    const managerID = report?.managerID || undefined;
+    const total = report?.total;
+    const nonReimbursableTotal = report?.nonReimbursableTotal;
+    const policyAvatar = report?.policyAvatar;
+    const fieldList = report?.fieldList;
+    const iouReportID = report?.iouReportID;
+    const isCancelledIOU = report?.isCancelledIOU;
+    const isOwnPolicyExpenseChat = report?.isOwnPolicyExpenseChat;
+    const writeCapability = report?.writeCapability;
+    const currency = report?.currency;
+    const visibility = report?.visibility;
+    const avatarUrl = report?.avatarUrl;
+    const policyName = report?.policyName;
+    const transactionCount = report?.transactionCount;
+    const unheldTotal = report?.unheldTotal;
+    const created = report?.created;
+
+    return useMemo(() => {
+        if (reportID === undefined) {
+            return undefined;
+        }
+        return {
+            reportID,
+            chatReportID,
+            isWaitingOnBankAccount,
+            permissions,
+            policyID,
+            ownerAccountID,
+            parentReportID,
+            parentReportActionID,
+            type,
+            chatType,
+            stateNum,
+            statusNum,
+            isDeletedParentAction,
+            pendingFields,
+            participants,
+            errorFields,
+            reportName,
+            description,
+            managerID,
+            total,
+            nonReimbursableTotal,
+            policyAvatar,
+            fieldList,
+            iouReportID,
+            isCancelledIOU,
+            isOwnPolicyExpenseChat,
+            writeCapability,
+            currency,
+            visibility,
+            avatarUrl,
+            policyName,
+            transactionCount,
+            unheldTotal,
+            created,
+        } as Report;
+    }, [
+        reportID,
+        chatReportID,
+        isWaitingOnBankAccount,
+        permissions,
+        policyID,
+        ownerAccountID,
+        parentReportID,
+        parentReportActionID,
+        type,
+        chatType,
+        stateNum,
+        statusNum,
+        isDeletedParentAction,
+        pendingFields,
+        participants,
+        errorFields,
+        reportName,
+        description,
+        managerID,
+        total,
+        nonReimbursableTotal,
+        policyAvatar,
+        fieldList,
+        iouReportID,
+        isCancelledIOU,
+        isOwnPolicyExpenseChat,
+        writeCapability,
+        currency,
+        visibility,
+        avatarUrl,
+        policyName,
+        transactionCount,
+        unheldTotal,
+        created,
+    ]);
+}
+
+export default useStableReportForReportActionItem;

src/pages/Debug/ReportAction/DebugReportActionCreatePage.tsx

@@ -112,7 +112,6 @@ function DebugReportActionCreatePage({
                                     parentReportAction={undefined}
                                     displayAsGroup={false}
                                     shouldDisplayNewMarker={false}
-                                    index={0}
                                     isFirstVisibleReportAction={false}
                                     shouldDisplayContextMenu={false}
                                     personalDetails={personalDetailsList}

src/pages/Debug/ReportAction/DebugReportActionPreview.tsx

@@ -27,7 +27,6 @@ function DebugReportActionPreview({reportAction, reportID}: DebugReportActionPre
                 parentReportAction={undefined}
                 displayAsGroup={false}
                 shouldDisplayNewMarker={false}
-                index={0}
                 isFirstVisibleReportAction={false}
                 shouldDisplayContextMenu={false}
                 personalDetails={personalDetails}

src/pages/TransactionDuplicate/DuplicateTransactionItem.tsx

@@ -7,6 +7,7 @@ import useThemeStyles from '@hooks/useThemeStyles';
 import getNonEmptyStringOnyxID from '@libs/getNonEmptyStringOnyxID';
 import {getOriginalMessage, getReportAction, isMoneyRequestAction} from '@libs/ReportActionsUtils';
 import {getOriginalReportID} from '@libs/ReportUtils';
+import ReportActionIndexContext from '@pages/inbox/report/ReportActionIndexContext';
 import ReportActionItem from '@pages/inbox/report/ReportActionItem';
 import {ReportActionItemActionsContext, ReportActionItemStateContext} from '@pages/inbox/report/ReportActionItemContext';
 import CONST from '@src/CONST';
@@ -58,19 +59,20 @@ function DuplicateTransactionItem({transaction, index, onPreviewPressed}: Duplic
         <View style={styles.pb2}>
             <ReportActionItemStateContext.Provider value={stateValue}>
                 <ReportActionItemActionsContext.Provider value={actionsValue}>
-                    <ReportActionItem
-                        action={action}
-                        report={report}
-                        parentReportAction={getReportAction(report?.parentReportID, report?.parentReportActionID)}
-                        index={index}
-                        displayAsGroup={false}
-                        shouldDisplayNewMarker={false}
-                        isFirstVisibleReportAction={false}
-                        shouldDisplayContextMenu={false}
-                        personalDetails={personalDetails}
-                        draftMessage={matchingDraftMessage}
-                        linkedTransactionRouteError={linkedTransactionRouteError}
-                    />
+                    <ReportActionIndexContext.Provider value={index}>
+                        <ReportActionItem
+                            action={action}
+                            report={report}
+                            parentReportAction={getReportAction(report?.parentReportID, report?.parentReportActionID)}
+                            displayAsGroup={false}
+                            shouldDisplayNewMarker={false}
+                            isFirstVisibleReportAction={false}
+                            shouldDisplayContextMenu={false}
+                            personalDetails={personalDetails}
+                            draftMessage={matchingDraftMessage}
+                            linkedTransactionRouteError={linkedTransactionRouteError}
+                        />
+                    </ReportActionIndexContext.Provider>
                 </ReportActionItemActionsContext.Provider>
             </ReportActionItemStateContext.Provider>
         </View>