fix

Tree/Tree.tsx

@@ -192,12 +192,12 @@ const LEAF_COLORS = ['', '#ed5145', '#fdb068', '#fee5cd'];
 
 export const TRUNK_TOP_CSS = (H - 150) + 10;
 
-const Tree = forwardRef<HTMLCanvasElement>(function Tree(_, ref) {
-  const internalRef = useRef<HTMLCanvasElement>(null);
-  const canvasRef = (ref as React.RefObject<HTMLCanvasElement>) ?? internalRef;
+let cachedTreeCanvas: HTMLCanvasElement | null = null;
 
-  useEffect(() => {
-    const canvas = canvasRef.current!;
+function renderTreeCanvas() {
+  if (cachedTreeCanvas) return cachedTreeCanvas;
+
+  const canvas = document.createElement("canvas");
   const ctx = canvas.getContext("2d")!;
   canvas.width = W * PX;
   canvas.height = H * PX;
@@ -258,6 +258,26 @@ const Tree = forwardRef<HTMLCanvasElement>(function Tree(_, ref) {
       ctx.fillRect((x + 1) * PX, (surfaceY - 1) * PX, PX, PX);
     }
   }
+
+  cachedTreeCanvas = canvas;
+  return canvas;
+}
+
+export function prewarmTreeCanvas() {
+  renderTreeCanvas();
+}
+
+const Tree = forwardRef<HTMLCanvasElement>(function Tree(_, ref) {
+  const internalRef = useRef<HTMLCanvasElement>(null);
+  const canvasRef = (ref as React.RefObject<HTMLCanvasElement>) ?? internalRef;
+
+  useEffect(() => {
+    const canvas = canvasRef.current!;
+    const ctx = canvas.getContext("2d")!;
+    canvas.width = W * PX;
+    canvas.height = H * PX;
+    ctx.clearRect(0, 0, canvas.width, canvas.height);
+    ctx.drawImage(renderTreeCanvas(), 0, 0);
   }, []);
 
   return (

src/App.jsx

@@ -1,7 +1,7 @@
 import { useEffect, useMemo, useRef, useState } from 'react'
 import L from 'leaflet'
 import 'leaflet/dist/leaflet.css'
-import Tree from '../Tree/Tree'
+import Tree, { prewarmTreeCanvas } from '../Tree/Tree'
 import FallingLeaves from '../Tree/FallingLeaves'
 
 const numberFormat = new Intl.NumberFormat('en-GB')
@@ -36,6 +36,7 @@ const analyticsPreferencesKey = 'tssbot.analyticsPreferences'
 const analyticsPreferencesCookie = 'tssbot_analytics_preferences'
 const analyticsVisitorKey = 'tssbot.analyticsVisitor'
 const analyticsConsentVersion = 3
+const liveRefreshMs = 15000
 
 const turnstileSiteKey = import.meta.env.VITE_TURNSTILE_SITE_KEY || ''
 
@@ -518,7 +519,7 @@ function App() {
 function AppContent() {
   const [route, setRoute] = useState(() => parseRoute())
   const [leaderboard, setLeaderboard] = useState({ status: 'idle', data: null, error: null })
-  const [live, setLive] = useState({ status: 'idle', data: null, error: null })
+  const [live, setLive] = useState({ status: 'idle', data: null, error: null, updatedAt: 0 })
   const [uptime, setUptime] = useState({ status: 'idle', checks: [], history: [], updatedAt: null })
   const [viewers, setViewers] = useState({ status: 'idle', data: null, error: null, updatedAt: null })
   const [analyticsPreferences, setAnalyticsPreferences] = useState(() => storedAnalyticsPreferences())
@@ -536,6 +537,11 @@ function AppContent() {
     [leaderboard.data],
   )
   const matches = live.data?.matches || []
+  const liveRef = useRef(live)
+
+  useEffect(() => {
+    liveRef.current = live
+  }, [live])
 
   function navigate(path) {
     window.history.pushState({}, '', path)
@@ -555,6 +561,20 @@ function AppContent() {
     return () => window.removeEventListener('scroll', onScroll)
   }, [])
 
+  useEffect(() => {
+    if (route.page === 'home') return
+
+    const prewarm = () => {
+      renderPixelMountainsCanvas()
+      prewarmTreeCanvas()
+    }
+    const requestIdle = window.requestIdleCallback || ((callback) => window.setTimeout(callback, 250))
+    const cancelIdle = window.cancelIdleCallback || window.clearTimeout
+    const id = requestIdle(prewarm)
+
+    return () => cancelIdle(id)
+  }, [route.page])
+
   useEffect(() => {
     const title =
       route.page === 'team' && route.teamName
@@ -747,17 +767,21 @@ function AppContent() {
   useEffect(() => {
     if (!['home', 'battle-logs'].includes(route.page)) return
     if (!teams.length) return
+    const currentLive = liveRef.current
+    if (currentLive.status === 'ready' && Date.now() - currentLive.updatedAt < liveRefreshMs) return
 
     const controller = new AbortController()
     setLive((current) =>
-      current.status === 'ready' ? current : { status: 'loading', data: null, error: null },
+      current.status === 'ready'
+        ? current
+        : { status: 'loading', data: null, error: null, updatedAt: current.updatedAt || 0 },
     )
 
     fetchRecentTssGames(teams, controller.signal)
-      .then((data) => setLive({ status: 'ready', data, error: null }))
+      .then((data) => setLive({ status: 'ready', data, error: null, updatedAt: Date.now() }))
       .catch((error) => {
         if (!controller.signal.aborted) {
-          setLive({ status: 'error', data: null, error: error.message })
+          setLive({ status: 'error', data: null, error: error.message, updatedAt: Date.now() })
         }
       })
 
@@ -771,13 +795,13 @@ function AppContent() {
     const controller = new AbortController()
     const timer = window.setInterval(() => {
       fetchRecentTssGames(teams, controller.signal)
-        .then((data) => setLive({ status: 'ready', data, error: null }))
+        .then((data) => setLive({ status: 'ready', data, error: null, updatedAt: Date.now() }))
         .catch((error) => {
           if (!controller.signal.aborted) {
             setLive((current) => ({ ...current, error: error.message }))
           }
         })
-    }, 15000)
+    }, liveRefreshMs)
 
     return () => {
       window.clearInterval(timer)
@@ -1771,11 +1795,12 @@ function RecentGamesSection({ live, matches, navigate }) {
   )
 }
 
-function PixelMountains() {
-  const canvasRef = useRef(null)
+let cachedPixelMountainsCanvas = null
 
-  useEffect(() => {
-    const canvas = canvasRef.current
+function renderPixelMountainsCanvas() {
+  if (cachedPixelMountainsCanvas) return cachedPixelMountainsCanvas
+
+  const canvas = document.createElement('canvas')
   const ctx = canvas.getContext('2d')
   const WORLD_W = 1920
   const WORLD_H = 900
@@ -1881,6 +1906,22 @@ function PixelMountains() {
   }
 
   draw()
+  cachedPixelMountainsCanvas = canvas
+  return canvas
+}
+
+function PixelMountains() {
+  const canvasRef = useRef(null)
+
+  useEffect(() => {
+    const canvas = canvasRef.current
+    const source = renderPixelMountainsCanvas()
+    const ctx = canvas.getContext('2d')
+
+    canvas.width = source.width
+    canvas.height = source.height
+    ctx.imageSmoothingEnabled = false
+    ctx.drawImage(source, 0, 0)
   }, [])
 
   return <canvas ref={canvasRef} className="pixel-mountains" aria-hidden="true" />