diff --git a/tests/integration/README.md b/tests/integration/README.md
index b1065a33c..59a860d05 100644
--- a/tests/integration/README.md
+++ b/tests/integration/README.md
@@ -143,8 +143,10 @@ Credentials used by the E2E suite can be overridden:
 - `PULSE_E2E_ALLOW_NODE_MUTATION=1` to enable the optional "Add Proxmox node" test (disabled by default for safety)
 - `PULSE_E2E_PERF=1` to enable navigation performance budget checks
 - `PULSE_E2E_PERF_ITERATIONS` (default `3`)
-- `PULSE_E2E_PERF_INFRA_TO_WORKLOADS_BUDGET_MS` (default `2200`)
-- `PULSE_E2E_PERF_WORKLOADS_TO_INFRA_BUDGET_MS` (default `2200`)
+- `PULSE_E2E_PERF_PROXMOX_TO_DOCKER_BUDGET_MS` (default `2200`)
+- `PULSE_E2E_PERF_DOCKER_TO_PROXMOX_BUDGET_MS` (default `2200`)
+- `PULSE_E2E_PERF_PROXMOX_OVERVIEW_TO_STORAGE_BUDGET_MS` (default `2200`)
+- `PULSE_E2E_PERF_PROXMOX_STORAGE_TO_OVERVIEW_BUDGET_MS` (default `2200`)
 
 ### Run Against An Existing Pulse Instance
 ```bash
diff --git a/tests/integration/tests/02-navigation-perf.spec.ts b/tests/integration/tests/02-navigation-perf.spec.ts
index 5815cee1c..70bfbf92d 100644
--- a/tests/integration/tests/02-navigation-perf.spec.ts
+++ b/tests/integration/tests/02-navigation-perf.spec.ts
@@ -96,6 +96,123 @@ const measureTabTransition = async (
   return Date.now() - start;
 };
 
+const makeLargeProxmoxEstate = () => {
+  const nodes = Array.from({ length: 50 }, (_, index) => {
+    const nodeNumber = index + 1;
+    return {
+      id: `synthetic:proxmox:node-${nodeNumber}`,
+      type: 'agent',
+      name: `pve-${String(nodeNumber).padStart(2, '0')}`,
+      status: 'online',
+      lastSeen: '2026-09-01T10:00:00Z',
+      sources: ['proxmox'],
+      platformScopes: ['proxmox-pve'],
+      metrics: {
+        cpu: { percent: (nodeNumber % 70) + 10 },
+        memory: { used: 24, total: 64, percent: 37.5 },
+        disk: { used: 320, total: 1024, percent: 31.25 },
+      },
+      proxmox: {
+        nodeName: `pve-${String(nodeNumber).padStart(2, '0')}`,
+        clusterName: 'synthetic-large-estate',
+        instance: 'synthetic-lab',
+        pveVersion: '9.0.3',
+        uptime: 1_000_000 + nodeNumber,
+      },
+    };
+  });
+
+  const guests = Array.from({ length: 900 }, (_, index) => {
+    const guestNumber = index + 1;
+    const nodeIndex = index % nodes.length;
+    const node = nodes[nodeIndex];
+    const nodeName = node.proxmox.nodeName;
+    const vmid = 100 + guestNumber;
+    return {
+      id: `synthetic:proxmox:${nodeName}:${vmid}`,
+      type: guestNumber % 4 === 0 ? 'system-container' : 'vm',
+      name: `workload-${String(guestNumber).padStart(4, '0')}`,
+      status: guestNumber % 9 === 0 ? 'stopped' : 'online',
+      parentId: node.id,
+      parentName: nodeName,
+      lastSeen: '2026-09-01T10:00:00Z',
+      sources: ['proxmox'],
+      platformScopes: ['proxmox-pve'],
+      metrics: {
+        cpu: { percent: guestNumber % 80 },
+        memory: { used: 2, total: 8, percent: 25 },
+        disk: { used: 20, total: 100, percent: 20 },
+      },
+      proxmox: {
+        nodeName,
+        clusterName: 'synthetic-large-estate',
+        instance: 'synthetic-lab',
+        vmid,
+        cpus: 4,
+        uptime: 100_000 + guestNumber,
+      },
+    };
+  });
+
+  const storage = Array.from({ length: 300 }, (_, index) => {
+    const storageNumber = index + 1;
+    const node = nodes[index % nodes.length];
+    const physicalDisk = storageNumber % 3 === 0;
+    return {
+      id: `synthetic:storage:${storageNumber}`,
+      type: physicalDisk ? 'physical_disk' : 'storage',
+      name: physicalDisk
+        ? `/dev/disk/by-id/synthetic-${storageNumber}`
+        : `pool-${String(storageNumber).padStart(3, '0')}`,
+      status: 'online',
+      parentId: node.id,
+      parentName: node.proxmox.nodeName,
+      lastSeen: '2026-09-01T10:00:00Z',
+      sources: physicalDisk ? ['agent', 'proxmox'] : ['proxmox'],
+      platformScopes: ['proxmox-pve'],
+      metrics: { disk: { used: 400, total: 1000, percent: 40 } },
+      storage: physicalDisk ? undefined : { type: 'zfs', isZfs: true },
+      physicalDisk: physicalDisk
+        ? { device: `/dev/sd${String.fromCharCode(97 + (storageNumber % 20))}` }
+        : undefined,
+      proxmox: {
+        nodeName: node.proxmox.nodeName,
+        clusterName: 'synthetic-large-estate',
+        instance: 'synthetic-lab',
+      },
+    };
+  });
+
+  return { overview: [...nodes, ...guests], storage: [...nodes, ...storage] };
+};
+
+const measureProxmoxSectionTransition = async (
+  page: Page,
+  section: 'Overview' | 'Storage',
+): Promise<number> => {
+  const start = Date.now();
+  await page
+    .getByRole('navigation', { name: 'Proxmox sections' })
+    .getByRole('link', { name: section, exact: true })
+    .click();
+
+  if (section === 'Storage') {
+    await expect(page).toHaveURL(/\/proxmox\/storage(?:\?|$)/);
+    await expect(page.getByTestId('storage-page')).toBeVisible();
+    await expect(
+      page.getByTestId('storage-page').locator('table').first(),
+    ).toBeVisible();
+  } else {
+    await expect(page).toHaveURL(/\/proxmox\/overview(?:\?|$)/);
+    await expect(page.getByTestId('proxmox-guests-section')).toBeVisible();
+    await expect(
+      page.getByTestId('proxmox-guests-section').locator('table').first(),
+    ).toBeVisible();
+  }
+
+  return Date.now() - start;
+};
+
 test.describe.serial('Navigation performance budgets', () => {
   test.skip(!truthy(process.env.PULSE_E2E_PERF), 'Set PULSE_E2E_PERF=1 to enable navigation perf checks');
 
@@ -162,4 +279,120 @@ test.describe.serial('Navigation performance budgets', () => {
       }
     }
   });
+
+  test('large-estate Proxmox section switches stay within budget', async ({
+    page,
+    browserName,
+    isMobile,
+  }) => {
+    test.skip(
+      browserName !== 'chromium' || Boolean(isMobile),
+      'Perf budgets are pinned to desktop Chromium',
+    );
+    test.slow();
+
+    const iterations = toPositiveInt(process.env.PULSE_E2E_PERF_ITERATIONS, 3);
+    const overviewToStorageBudgetMs = toPositiveInt(
+      process.env.PULSE_E2E_PERF_PROXMOX_OVERVIEW_TO_STORAGE_BUDGET_MS,
+      2200,
+    );
+    const storageToOverviewBudgetMs = toPositiveInt(
+      process.env.PULSE_E2E_PERF_PROXMOX_STORAGE_TO_OVERVIEW_BUDGET_MS,
+      2200,
+    );
+    const estate = makeLargeProxmoxEstate();
+    const typeCounts = {
+      agent: 50,
+      vm: 675,
+      'system-container': 225,
+      storage: 200,
+      physical_disk: 100,
+    };
+
+    await page.routeWebSocket('**/ws*', () => {});
+    await page.route('**/api/resources?**', async (route) => {
+      const url = new URL(route.request().url());
+      const types = url.searchParams.get('type');
+      const sources = url.searchParams.get('source');
+      let resources: readonly Record<string, unknown>[] | undefined;
+
+      if (
+        types === 'agent,vm,system-container,oci-container' &&
+        sources === 'proxmox'
+      ) {
+        resources = estate.overview;
+      } else if (
+        types === 'agent,pbs,storage,physical_disk,ceph' &&
+        sources === 'proxmox,pbs,agent'
+      ) {
+        resources = estate.storage;
+      }
+
+      if (!resources) {
+        await route.continue();
+        return;
+      }
+
+      const pageNumber = Math.max(1, Number(url.searchParams.get('page')) || 1);
+      const limit = Math.max(1, Number(url.searchParams.get('limit')) || 100);
+      const totalPages = Math.max(1, Math.ceil(resources.length / limit));
+      const start = (pageNumber - 1) * limit;
+      const data = resources.slice(start, start + limit);
+      await route.fulfill({
+        status: 200,
+        contentType: 'application/json',
+        body: JSON.stringify({
+          data,
+          meta: {
+            page: pageNumber,
+            limit,
+            total: resources.length,
+            totalPages,
+          },
+          aggregations: { total: 1_250, byType: typeCounts },
+        }),
+      });
+    });
+
+    await ensureAuthenticated(page);
+    await gotoWithBackendRetry(page, '/proxmox/overview');
+    await waitForProxmoxReady(page);
+    await expect(page.locator('tr[data-guest-id]').first()).toBeVisible();
+    const mountedGuestRows = await page.locator('tr[data-guest-id]').count();
+    expect(mountedGuestRows).toBeGreaterThan(0);
+    expect(mountedGuestRows).toBeLessThanOrEqual(140);
+
+    // Warm both retained sections before measuring the operator's steady-state
+    // workflow. The synthetic estate matches the demo performance profile but
+    // keeps this browser gate independent of mutable backend fixture settings.
+    await measureProxmoxSectionTransition(page, 'Storage');
+    await measureProxmoxSectionTransition(page, 'Overview');
+
+    const overviewToStorageSamples: number[] = [];
+    const storageToOverviewSamples: number[] = [];
+    for (let index = 0; index < iterations; index++) {
+      overviewToStorageSamples.push(
+        await measureProxmoxSectionTransition(page, 'Storage'),
+      );
+      storageToOverviewSamples.push(
+        await measureProxmoxSectionTransition(page, 'Overview'),
+      );
+    }
+
+    const overviewToStorageMedianMs = median(overviewToStorageSamples);
+    const storageToOverviewMedianMs = median(storageToOverviewSamples);
+    console.log(
+      `[perf] proxmox overview->storage samples=${overviewToStorageSamples.join(',')} median=${overviewToStorageMedianMs}ms budget=${overviewToStorageBudgetMs}ms`,
+    );
+    console.log(
+      `[perf] proxmox storage->overview samples=${storageToOverviewSamples.join(',')} median=${storageToOverviewMedianMs}ms budget=${storageToOverviewBudgetMs}ms`,
+    );
+
+    expect(overviewToStorageMedianMs).toBeLessThanOrEqual(
+      overviewToStorageBudgetMs,
+    );
+    expect(storageToOverviewMedianMs).toBeLessThanOrEqual(
+      storageToOverviewBudgetMs,
+    );
+  });
 });