v8.getHeapCodeStatistics()
获取堆中代码及其元数据的统计信息,请参阅 V8 GetHeapCodeAndMetadataStatistics API。返回具有以下属性的对象:
¥Get statistics about code and its metadata in the heap, see V8
GetHeapCodeAndMetadataStatistics API. Returns an object with the
following properties:
- 
code_and_metadata_size<number> - 
bytecode_and_metadata_size<number> - 
external_script_source_size<number> - 
cpu_profiler_metadata_size<number> 
{
  code_and_metadata_size: 212208,
  bytecode_and_metadata_size: 161368,
  external_script_source_size: 1410794,
  cpu_profiler_metadata_size: 0,
}