Skip to content

perf(ActionMenu): memoize context values#7619

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
jonrohan merged 9 commits into from
Apr 28, 2026
Merged

perf(ActionMenu): memoize context values #7619

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
9 commits
Select commit Hold shift + click to select a range
3749a98
perf(ActionMenu): memoize context values to prevent unnecessary re-re…
hectahertz Mar 4, 2026
8d96f15
chore: changeset
hectahertz Mar 4, 2026
f807747
Merge branch 'main' into hectahertz/perf-action-menu-memo-context
hectahertz Mar 31, 2026
4d703ff
chore: retrigger CI
hectahertz Mar 31, 2026
4868ed4
Merge branch 'main' into hectahertz/perf-action-menu-memo-context
hectahertz Apr 1, 2026
53dff47
chore: retrigger CI
hectahertz Apr 1, 2026
6415a25
Merge branch 'main' into hectahertz/perf-action-menu-memo-context
primer[bot] Apr 9, 2026
10172fd
Merge branch 'main' into hectahertz/perf-action-menu-memo-context
primer[bot] Apr 9, 2026
1431c49
Merge branch 'main' into hectahertz/perf-action-menu-memo-context
jonrohan Apr 28, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
5 changes: 5 additions & 0 deletions .changeset/perf-action-menu-memo-context.md
View file
Open in desktop
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,5 @@
---
'@primer/react': patch
---

Memoize ActionMenu context values to prevent unnecessary re-renders of menu items
56 changes: 30 additions & 26 deletions packages/react/src/ActionMenu/ActionMenu.tsx
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -172,22 +172,22 @@ const Menu: FCWithSlotMarker<React.PropsWithChildren<ActionMenuProps>> = ({
}
})

return (
<MenuContext.Provider
value={{
anchorRef,
renderAnchor,
anchorId,
open: combinedOpenState,
onOpen,
onClose,
// will be undefined for the outermost level, then false for the top menu, then true inside that
isSubmenu: parentMenuContext.isSubmenu !== undefined,
}}
>
{contents}
</MenuContext.Provider>
const isSubmenu = parentMenuContext.isSubmenu !== undefined

const menuContextValue = useMemo(
() => ({
anchorRef,
renderAnchor,
anchorId,
open: combinedOpenState,
onOpen,
onClose,
isSubmenu,
}),
[anchorRef, renderAnchor, anchorId, combinedOpenState, onOpen, onClose, isSubmenu],
Comment on lines +177 to +187

CopilotAIMar 4, 2026

Copy link

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

menuContextValue will still change on every render because renderAnchor is reassigned to a newly-created inline function during the React.Children.map(...) pass. Since renderAnchor is in the useMemo deps, this memoization won’t prevent re-renders of MenuContext consumers in the common case. Consider memoizing renderAnchor (and/or the contents computation that sets it) so the function identity is stable when children/anchorRef haven’t changed, otherwise the useMemo here provides little/no benefit.

Copilot uses AI. Check for mistakes.
)

return <MenuContext.Provider value={menuContextValue}>{contents}</MenuContext.Provider>
}

// eslint-disable-next-line @typescript-eslint/no-explicit-any
Expand DownExpand Up@@ -329,6 +329,20 @@ const Overlay: FCWithSlotMarker<React.PropsWithChildren<MenuOverlayProps>> = ({
}
}, [anchorRef])

const afterSelect = useCallback(() => onClose?.('item-select'), [onClose])

const overlayContextValue = useMemo(
() => ({
container: 'ActionMenu' as const,
listRole: 'menu' as const,
listLabelledBy: ariaLabelledby || anchorAriaLabelledby || anchorId,
selectionAttribute: 'aria-checked' as const,
afterSelect,
enableFocusZone: isNarrowFullscreen,
}),
[ariaLabelledby, anchorAriaLabelledby, anchorId, afterSelect, isNarrowFullscreen],
)

const isInsideDialog = useContext(DialogContext) !== undefined

return (
Expand All@@ -354,17 +368,7 @@ const Overlay: FCWithSlotMarker<React.PropsWithChildren<MenuOverlayProps>> = ({
{...(overlayProps.overflow ? {[`data-overflow-${overlayProps.overflow}`]: ''} : {})}
{...(overlayProps.maxHeight ? {[`data-max-height-${overlayProps.maxHeight}`]: ''} : {})}
>
<ActionListContainerContext.Provider
value={{
container: 'ActionMenu',
listRole: 'menu',
// If there is a custom aria-labelledby, use that. Otherwise, if exists, use the id that labels the anchor such as tooltip. If none of them exist, use anchor id.
listLabelledBy: ariaLabelledby || anchorAriaLabelledby || anchorId,
selectionAttribute: 'aria-checked', // Should this be here?
afterSelect: () => onClose?.('item-select'),
enableFocusZone: isNarrowFullscreen, // AnchoredOverlay takes care of focus zone. We only want to enable this if menu is narrow fullscreen.
}}
>
<ActionListContainerContext.Provider value={overlayContextValue}>
{children}
</ActionListContainerContext.Provider>
</div>
Expand Down
Loading