How does AngularJS handle large-scale frontend performance degradation over time (long-running SPA issues)?

AngularJS degrades over time due to accumulating watchers, memory leaks, and unoptimized digest cycles, requiring manual lifecycle management.

Long-running AngularJS SPAs suffer from progressive performance decay because the framework does not aggressively garbage collect watchers, scopes, or DOM bindings. Every view transition can leave behind orphaned watchers or event listeners if not explicitly cleaned. Over time, digest cycles become slower due to increased dirty-checking workload. Enterprise systems mitigate this using scope destruction hooks, one-time bindings (::), manual deregistration of listeners, and view-level caching strategies. Architecture must enforce strict lifecycle management policies.