C struct (192 Bytes) vs Rust struct (200 Bytes)

C struct

struct apk_package {
	apk_hash_node hash_node;
	union {
		struct apk_solver_package_state ss;
		struct {
			unsigned int foreach_genid;
			union {
				int state_int;
				void *state_ptr;
			};
		};
	};
	struct apk_name *name;
	struct apk_installed_package *ipkg;
	apk_blob_t *version, *arch, *license;
	apk_blob_t *origin, *maintainer;
	char *url, *description, *commit;
	char *filename;
	struct apk_dependency_array *depends, *install_if, *provides;
	size_t installed_size, size;
	time_t build_time;
	unsigned short provider_priority;
	unsigned repos : APK_MAX_REPOS;
	unsigned marked : 1;
	unsigned uninstallable : 1;
	unsigned cached_non_repository : 1;
	struct apk_checksum csum;
};

Rust

# [repr(C)]
#[derive(Copy,Clone)]
pub struct apk_package {
  pub hash_node : apk_hash_node ,
  pub __bindgen_anon_1 : apk_package__bindgen_ty_1 ,
  pub name : * mut apk_name ,
  pub ipkg : * mut apk_installed_package ,
  pub version : * mut apk_blob_t ,
  pub arch : * mut apk_blob_t ,
  pub license : * mut apk_blob_t ,
  pub origin : * mut apk_blob_t ,
  pub maintainer : * mut apk_blob_t ,
  pub url : * mut :: std :: os :: raw :: c_char ,
  pub description : * mut :: std :: os :: raw :: c_char ,
  pub commit : * mut :: std :: os :: raw :: c_char ,
  pub filename : * mut :: std :: os :: raw :: c_char ,
  pub depends : * mut apk_dependency_array ,
  pub install_if : * mut apk_dependency_array ,
  pub provides : * mut apk_dependency_array ,
  pub installed_size : size_t , pub size : size_t ,
  pub build_time : time_t ,
  pub provider_priority : :: std :: os :: raw :: c_ushort ,
  pub _bitfield_1 : __BindgenBitfieldUnit < [ u8 ; 8usize ] , u32 > ,
  pub csum : apk_checksum ,
 }