[Lambda][Node.js] Pointer compression / memory-optimized runtime option for large bundles and source maps

Hi Lambda team,

We hit a practical memory wall with Node.js Lambda and wanted to ask if pointer compression (or an equivalent runtime-level memory optimization) is on the roadmap for managed Node runtimes.

Our use case is a backend Lambda with a single-file minified bundle. Normal artifact size is ~7.6 MB. If we enable source maps for debugging (`NODE_OPTIONS=--enable-source-maps`), artifact size jumps to ~31.7 MB (`index.mjs` + `index.mjs.map`).

What we observed in real traffic tests:
- Runtime: Node.js 24.x
- Arch: arm64
- Memory: 256 MB
- Without source maps: cold starts are acceptable for our use case
- With source maps enabled: cold start increases, and we started seeing `Runtime.OutOfMemory` at 256 MB in the editor/debug environment

We can work around this by disabling source maps or increasing memory, but this is a tough tradeoff:
- disabling source maps hurts debuggability
- increasing memory increases cost for workloads that are otherwise lightweight

Request:
Could Lambda provide either:
1. managed Node runtimes with V8 pointer compression enabled, or
2. another runtime-level memory optimization path for Node workloads with large bundles/maps?

Even an experimental/runtime flag path would already help for debugging-heavy environments.

Thanks for considering this.

Das Issue nennt keine Repository-Dateien, Tests oder Einstiegspunkte für die Implementierung. Beginne mit der Prüfung der Beobachtungen zu Node.js 24.x, arm64 und 256 MB sowie der Anfrage nach pointer compression oder einer gleichwertigen Option für die verwaltete Laufzeit; abgeschlossen wäre die Aufgabe erst mit einer Lösung auf AWS-Lambda-Runtime-Ebene oder einem dokumentierten experimentellen Pfad.

Vom Indexierungsmodell aus dem Issue-Text verfasst.