Function startMemoryPeakTracking

startMemoryPeakTracking(options?: MemoryPeakOptions): () => void
Start lightweight peak-memory tracking.
- If performance.memory is unavailable, this becomes a no-op (safe).
- In "onHide" mode, the tracker reports at most once per page lifetime.
- In "interval" mode, it reports at a low frequency (use conservatively).
- In "manual" mode, you can call reportMemoryPeak() whenever you like.
Parameters
- options: MemoryPeakOptions = {}
Returns () => void
- - (): void
  - Stop tracking and remove listeners. Does not clear the last observed peak.
    
    Returns void
Example
```
import { startMemoryPeakTracking } from "datadog-ux-utils/memoryPeak";

// Default: records peaks and reports once when the tab hides/unloads
const stop = startMemoryPeakTracking();

// Clean up later (SPA teardown)
stop();
```
Example
```
// Interval mode (report every 2 minutes)
startMemoryPeakTracking({ mode: "interval", intervalMs: 120_000 });
```
- Defined in src/perf/memoryPeak.ts:62