It seems that the 4 bit field doesn't become effective.

[fangneverdown]

class LeafEntry {
public:
uint8_t f_version : 4;
Key key;
Value value;
uint8_t r_version : 4;

LeafEntry() {
f_version = 0;
r_version = 0;
value = kValueNull;
key = 0;
}
} attribute((packed));

The size of LeafEntry is still 18 bytes, not 17. Is there any other solution to save 1 byte?

[Transpeptidase]

Hi, thank you for pointing out this bug. To save the 1 byte, we should operate the LeafEntry via bit-shift operations