|  | v8
    9.0.257(node16.0.0)
    V8 is Google's open source JavaScript engine | 
#include <heap-statistics.h>
| Data Fields | |
| size_t | physical_size_bytes = 0 | 
| size_t | used_size_bytes = 0 | 
Page granularity statistics. For each page the statistics record the allocated memory size and overall used memory size for the page.
Definition at line 52 of file heap-statistics.h.
| size_t physical_size_bytes = 0 | 
Overall amount of memory allocated for the page.
Definition at line 54 of file heap-statistics.h.
| size_t used_size_bytes = 0 | 
Amount of memory actually used on the page.
Definition at line 56 of file heap-statistics.h.