Returns an object with the following properties:

      does_zap_garbage is a 0/1 boolean, which signifies whether the --zap_code_space option is enabled or not. This makes V8 overwrite heap garbage with a bit pattern. The RSS footprint (resident set size) gets bigger because it continuously touches all heap pages and that makes them less likely to get swapped out by the operating system.

      number_of_native_contexts The value of native_context is the number of the top-level contexts currently active. Increase of this number over time indicates a memory leak.

      number_of_detached_contexts The value of detached_context is the number of contexts that were detached and not yet garbage collected. This number being non-zero indicates a potential memory leak.

        total_heap_size: 7326976,
        total_heap_size_executable: 4194304,
        total_physical_size: 7326976,
        total_available_size: 1152656,
        used_heap_size: 3476208,
        heap_size_limit: 1535115264,
        malloced_memory: 16384,
        peak_malloced_memory: 1127496,
        does_zap_garbage: 0,
        number_of_native_contexts: 1,
        number_of_detached_contexts: 0