diff --git a/src/presentation/components/App.ts b/src/presentation/components/App.ts
index dc84ec4..6ae3d3b 100755
--- a/src/presentation/components/App.ts
+++ b/src/presentation/components/App.ts
@@ -324,8 +324,18 @@ export class App {
   }
 
   // ── Live update loop ──────────────────────────────────────────
+  private lastRafTime = 0;
+
   private startAnimationLoop(): void {
-    const loop = () => {
+    const loop = (now: number) => {
+      // Throttle à ~4fps quand aucun timer ne tourne (idle)
+      const data = this.getDashboardData();
+      const anyRunning = data.enclosSummaries.some(e => e.running);
+      if (!anyRunning && now - this.lastRafTime < 250) {
+        this.rafId = requestAnimationFrame(loop);
+        return;
+      }
+      this.lastRafTime = now;
       this.updateTabDots();
       if (this.activeChild) this.activeChild.update();
       this.rafId = requestAnimationFrame(loop);
diff --git a/src/presentation/components/EnclosView.ts b/src/presentation/components/EnclosView.ts
index b4a38d5..d1e882c 100755
--- a/src/presentation/components/EnclosView.ts
+++ b/src/presentation/components/EnclosView.ts
@@ -15,10 +15,28 @@ import { UndoManager } from '@presentation/services/UndoManager';
 
 const ALL_GAUGES: GaugeType[] = ['baffeur', 'caresseur', 'foudroyeur', 'abreuvoir', 'dragofesse', 'mangeoire'];
 
+interface CachedGaugeEls {
+  tier: Element | null;
+  bar: HTMLElement | null;
+  empty: Element | null;
+  inp: HTMLInputElement | null;
+}
+
 export class EnclosView {
   private el: HTMLElement | null = null;
   private enclosId = 0;
   private ddCards: Map<number, DragodindeCard> = new Map();
+  private cachedEls: {
+    elapsed: Element | null;
+    gcd: Element | null;
+    tbtn: HTMLButtonElement | null;
+    resetBtn: HTMLElement | null;
+    doneBanner: HTMLElement | null;
+    doneResetBtn: HTMLElement | null;
+    ddCount: Element | null;
+    addBtn: HTMLButtonElement | null;
+    gauges: Map<string, CachedGaugeEls>;
+  } | null = null;
 
   constructor(
     private commandBus: CommandBus,
@@ -179,9 +197,35 @@ export class EnclosView {
     `;
 
     this.bindEvents(enc);
+    this.cacheElements(enc);
     this.renderDdCards(enc);
   }
 
+  private cacheElements(enc: Enclos): void {
+    if (!this.el) return;
+    const eId = this.enclosId;
+    const gauges = new Map<string, CachedGaugeEls>();
+    enc.activeGauges.forEach(gid => {
+      gauges.set(gid, {
+        tier: this.el!.querySelector(`#gtier-${eId}-${gid}`),
+        bar: this.el!.querySelector<HTMLElement>(`#gbar-${eId}-${gid}`),
+        empty: this.el!.querySelector(`#gempty-${eId}-${gid}`),
+        inp: this.el!.querySelector<HTMLInputElement>(`#glvl-${eId}-${gid}`),
+      });
+    });
+    this.cachedEls = {
+      elapsed: this.el.querySelector(`#elapsed-${eId}`),
+      gcd: this.el.querySelector(`#gcd-${eId}`),
+      tbtn: this.el.querySelector<HTMLButtonElement>(`#tbtn-${eId}`),
+      resetBtn: this.el.querySelector<HTMLElement>(`#treset-${eId}`),
+      doneBanner: this.el.querySelector<HTMLElement>(`#done-banner-${eId}`),
+      doneResetBtn: this.el.querySelector<HTMLElement>(`#done-reset-${eId}`),
+      ddCount: this.el.querySelector(`#ddcount-${eId}`),
+      addBtn: this.el.querySelector<HTMLButtonElement>(`#adddd-${eId}`),
+      gauges,
+    };
+  }
+
   private bindEvents(enc: Enclos): void {
     if (!this.el) return;
     const eId = this.enclosId;
@@ -307,54 +351,52 @@ export class EnclosView {
   }
 
   update(): void {
-    if (!this.el) return;
+    if (!this.el || !this.cachedEls) return;
     const enc = this.getEnc();
-    const eId = this.enclosId;
-    const { globalMax, allDone, started, el: elSec, ddDone } = enclosGlobalState(enc);
+    const c = this.cachedEls;
+    const { globalMax, allDone, started, el: elSec } = enclosGlobalState(enc);
     const running = enc.timer.running;
 
     /* Complétion automatique : toutes les cibles atteintes → une seule alarme */
     if (allDone && running && enc.dragodindes.length > 0 && enc.activeGauges.length > 0) {
-      this.commandBus.execute({ type: 'complete-timer', enclosId: eId });
+      this.commandBus.execute({ type: 'complete-timer', enclosId: this.enclosId });
       this.renderInner();
       return;
     }
 
     /* Elapsed clock */
-    const elapsedEl = this.el.querySelector(`#elapsed-${eId}`);
-    if (elapsedEl) elapsedEl.textContent = fmtClock(elSec);
+    if (c.elapsed) c.elapsed.textContent = fmtClock(elSec);
 
     /* Global countdown */
-    const gcdEl = this.el.querySelector(`#gcd-${eId}`);
-    if (gcdEl) {
+    if (c.gcd) {
       if (enc.activeGauges.length > 0 && enc.dragodindes.length > 0) {
         if (allDone) {
-          gcdEl.textContent = '✅';
+          c.gcd.textContent = '✅';
         } else if (!isFinite(globalMax)) {
-          gcdEl.textContent = '∞';
+          c.gcd.textContent = '∞';
         } else {
-          gcdEl.textContent = fmtClock(globalMax);
+          c.gcd.textContent = fmtClock(globalMax);
         }
       } else {
-        gcdEl.textContent = '--:--:--';
+        c.gcd.textContent = '--:--:--';
       }
     }
 
     /* Timer button state */
-    const tbtn = this.el.querySelector<HTMLButtonElement>(`#tbtn-${eId}`);
-    if (tbtn) {
+    if (c.tbtn) {
       const timerIcon = running ? 'pause' : 'play_arrow';
       const timerText = running ? 'PAUSE' : (enc.timer.pausedAt && !enc.alerted['__done__'] ? 'REPRENDRE' : 'DÉMARRER');
-      tbtn.className = running ? 'enc-start-btn enc-btn-pause' : 'enc-start-btn';
-      tbtn.innerHTML = `<span class="material-symbols-outlined">${timerIcon}</span>${timerText}`;
+      c.tbtn.className = running ? 'enc-start-btn enc-btn-pause' : 'enc-start-btn';
+      c.tbtn.innerHTML = `<span class="material-symbols-outlined">${timerIcon}</span>${timerText}`;
     }
 
     /* Reset button visibility */
-    const resetBtn = this.el.querySelector<HTMLElement>(`#treset-${eId}`);
-    if (resetBtn) resetBtn.style.display = started ? '' : 'none';
+    if (c.resetBtn) c.resetBtn.style.display = started ? '' : 'none';
 
-    /* Gauge config live updates (tier badges and bars decay over time) */
+    /* Gauge config live updates (cached — no querySelector per frame) */
     enc.activeGauges.forEach(gid => {
+      const g = c.gauges.get(gid);
+      if (!g) return;
       const startGl = started ? (enc.timer.snapGauges[gid] ?? enc.gaugeLevels[gid]) : enc.gaugeLevels[gid];
       const curGl = started ? enclosGaugeCurGl(enc, gid) : startGl;
       const tn = tierNum(curGl);
@@ -363,62 +405,48 @@ export class EnclosView {
       const emptyTime = curGl > 0 ? timeToGain(curGl, curGl) : 0;
       const emptyStr = emptyTime === Infinity ? '∞' : fmt(emptyTime);
 
-      const tierEl = this.el!.querySelector(`#gtier-${eId}-${gid}`);
-      if (tierEl) {
-        tierEl.textContent = curGl > 0 ? `Tier ${tn} · ±${tr}/tick` : 'Jauge vide';
+      if (g.tier) {
+        g.tier.textContent = curGl > 0 ? `Tier ${tn} · ±${tr}/tick` : 'Jauge vide';
       }
-
-      const barEl = this.el!.querySelector<HTMLElement>(`#gbar-${eId}-${gid}`);
-      if (barEl) barEl.style.width = `${pct.toFixed(1)}%`;
-
-      const emptyEl = this.el!.querySelector(`#gempty-${eId}-${gid}`);
-      if (emptyEl) {
+      if (g.bar) g.bar.style.width = `${pct.toFixed(1)}%`;
+      if (g.empty) {
         if (curGl > 0) {
-          emptyEl.textContent = `Vide en ${emptyStr}`;
-          emptyEl.classList.remove('enc-gauge-alert');
+          g.empty.textContent = `Vide en ${emptyStr}`;
+          g.empty.classList.remove('enc-gauge-alert');
         } else if (started && running) {
-          emptyEl.textContent = '⚠ Rechargez la jauge';
-          emptyEl.classList.add('enc-gauge-alert');
+          g.empty.textContent = '⚠ Rechargez la jauge';
+          g.empty.classList.add('enc-gauge-alert');
         } else {
-          emptyEl.textContent = 'Vide';
-          emptyEl.classList.remove('enc-gauge-alert');
+          g.empty.textContent = 'Vide';
+          g.empty.classList.remove('enc-gauge-alert');
         }
       }
-
-      /* Mettre à jour la valeur affichée de l'input et son état en temps réel */
-      const inp = this.el!.querySelector<HTMLInputElement>(`#glvl-${eId}-${gid}`);
-      if (inp) {
-        // Synchroniser data-running avec l'état réel du timer
-        inp.dataset.running = started ? '1' : '0';
-        // Mettre à jour la valeur affichée (sauf si l'utilisateur est en train de taper)
-        if (document.activeElement !== inp) {
-          inp.value = String(Math.round(started ? curGl : (enc.gaugeLevels[gid] ?? 0)));
+      if (g.inp) {
+        g.inp.dataset.running = started ? '1' : '0';
+        if (document.activeElement !== g.inp) {
+          g.inp.value = String(Math.round(started ? curGl : (enc.gaugeLevels[gid] ?? 0)));
         }
       }
     });
 
     /* Done banner */
-    const doneBanner = this.el.querySelector<HTMLElement>(`#done-banner-${eId}`);
-    if (doneBanner) {
-      doneBanner.style.display = (allDone && started && enc.dragodindes.length > 0 && enc.activeGauges.length > 0) ? '' : 'none';
+    if (c.doneBanner) {
+      c.doneBanner.style.display = (allDone && started && enc.dragodindes.length > 0 && enc.activeGauges.length > 0) ? '' : 'none';
     }
 
-    /* Bouton "Nouvelle fournée" — visible uniquement si toutes les DD ont 20000 en maturité, endurance et amour */
-    const doneResetBtn = this.el.querySelector<HTMLElement>(`#done-reset-${eId}`);
-    if (doneResetBtn) {
+    /* Bouton "Nouvelle fournée" */
+    if (c.doneResetBtn) {
       const allMaxed = enc.dragodindes.length > 0 && enc.dragodindes.every(dd =>
         dd.stats.maturite >= 20000 && dd.stats.endurance >= 20000 && dd.stats.amour >= 20000
       );
-      doneResetBtn.style.display = allMaxed ? '' : 'none';
+      c.doneResetBtn.style.display = allMaxed ? '' : 'none';
     }
 
     /* DD count */
-    const ddCountEl = this.el.querySelector(`#ddcount-${eId}`);
-    if (ddCountEl) ddCountEl.textContent = `${enc.dragodindes.length}/10`;
+    if (c.ddCount) c.ddCount.textContent = `${enc.dragodindes.length}/10`;
 
     /* Add button state */
-    const addBtn = this.el.querySelector<HTMLButtonElement>(`#adddd-${eId}`);
-    if (addBtn) addBtn.disabled = enc.dragodindes.length >= 10;
+    if (c.addBtn) c.addBtn.disabled = enc.dragodindes.length >= 10;
 
     /* Update each DD card */
     enc.dragodindes.forEach(dd => {
@@ -439,6 +467,7 @@ export class EnclosView {
   destroy(): void {
     this.ddCards.forEach(card => card.destroy());
     this.ddCards.clear();
+    this.cachedEls = null;
     this.el?.remove();
     this.el = null;
   }
diff --git a/src/presentation/components/Sidebar.ts b/src/presentation/components/Sidebar.ts
index 3136c73..4187d05 100755
--- a/src/presentation/components/Sidebar.ts
+++ b/src/presentation/components/Sidebar.ts
@@ -5,6 +5,7 @@ import { esc } from '@presentation/helpers/format';
 
 export class Sidebar {
   private el: HTMLElement | null = null;
+  private cachedVersion: string | null = null;
 
   constructor(
     private uiState: UIState,
@@ -32,7 +33,7 @@ export class Sidebar {
     html += `
       <div class="sb-header">
         <div class="sb-logo-wrap">
-          <img src="/icone_sidebar.png" alt="logo" class="sb-logo-img" />
+          <img src="icone_sidebar.png" alt="logo" class="sb-logo-img" />
         </div>
         <div class="sb-brand">
           <span class="sb-brand-name">Obsidienne</span>
@@ -111,9 +112,15 @@ export class Sidebar {
   }
 
   private fetchAndInjectVersion(): void {
+    if (this.cachedVersion) {
+      const verEl = this.el?.querySelector('#sb-ver');
+      if (verEl) verEl.textContent = `v${this.cachedVersion}`;
+      return;
+    }
     const api = (window as any).electronAPI;
     if (!api?.getVersion) return;
     api.getVersion().then((v: string) => {
+      this.cachedVersion = v;
       const verEl = this.el?.querySelector('#sb-ver');
       if (verEl) verEl.textContent = `v${v}`;
     }).catch(() => {});
diff --git a/src/public/icone_sidebar.png b/src/public/icone_sidebar.png
index 2f0f8a8..628ea03 100755
Binary files a/src/public/icone_sidebar.png and b/src/public/icone_sidebar.png differ