Reduce Reanimated serialization traffic (#6219)

src/view/com/util/MainScrollProvider.tsx

@@ -3,6 +3,7 @@ import {NativeScrollEvent} from 'react-native'
 import {
   cancelAnimation,
   interpolate,
+  makeMutable,
   useSharedValue,
   withSpring,
 } from 'react-native-reanimated'
@@ -20,6 +21,18 @@ function clamp(num: number, min: number, max: number) {
   return Math.min(Math.max(num, min), max)
 }
 
+const V0 = makeMutable(
+  withSpring(0, {
+    overshootClamping: true,
+  }),
+)
+
+const V1 = makeMutable(
+  withSpring(1, {
+    overshootClamping: true,
+  }),
+)
+
 export function MainScrollProvider({children}: {children: React.ReactNode}) {
   const {headerHeight} = useShellLayout()
   const {headerMode} = useMinimalShellMode()
@@ -31,9 +44,7 @@ export function MainScrollProvider({children}: {children: React.ReactNode}) {
     (v: boolean) => {
       'worklet'
       cancelAnimation(headerMode)
-      headerMode.value = withSpring(v ? 1 : 0, {
-        overshootClamping: true,
-      })
+      headerMode.value = v ? V1.value : V0.value
     },
     [headerMode],
   )