The code i am using is below:
#include <fstream>
#include <iostream>
#include <string>
#include "addressbook.pb.h"
#define FILENAME "ashu.pb"
using namespace std;
AddressBook address_book;
int getFileSize()
{
ifstream file(FILENAME, ifstream::in | ifstream::binary);
if(!file.is_open())
{
return -1;
}
file.seekg(0, ios::end);
int fileSize = file.tellg();
cout << "Size ----- " << fileSize << endl;
file.close();
return fileSize;
}
int main()
{
int x,size;
Person *p = address_book.add_people();
Person::PhoneNumber* phone_number = p->add_phones();
fstream out(FILENAME, ios::out | ios::binary | ios::trunc);
for(int j=0;j<5000;j++)
{
p = address_book.add_people();
p->add_id(j);
}
x = address_book.SerializeToOstream(&out);
out.close();
size = getFileSize();
cout << "size " << size << endl;
AddressBook ad1;
fstream in(FILENAME, ios::in | ios::binary);
ad1.ParseFromIstream(&in);
return 0;
}
and i am using only id field of message Person. Is that the reason why i
end up getting more size with packed.
On Friday, December 7, 2018 at 12:12:04 PM UTC+5:30, [email protected]
wrote:
>
> I am trying to find out difference in encoded size using packed equal to
> true and without any packed encoding. I looped a int32 variable 5000 times.
> With packed = true, i get size as 29876 and without packed encoding, i get
> size as 24876. I am confused why i get opposite results. As per my
> understanding, size with packed should be less as compared to non packed.
> Can anyone please explain what the issue is?
> My proto file is below for non packed and for packed i modify id filed as;
> repeated int32 id = 2[packed=true]:
>
> syntax = "proto2";
> message Person {
> optional string name = 1;
> repeated int32 id = 2;
> optional string email = 3;
>
> enum PhoneType {
> MOBILE = 0;
> HOME = 1;
> WORK = 2;
> }
>
> message PhoneNumber {
> optional string number = 1;
> optional PhoneType type = 2 [default = HOME];
> }
>
> repeated PhoneNumber phones = 4;
> }
>
> message AddressBook {
> repeated Person people = 1;
> }
>
--
You received this message because you are subscribed to the Google Groups
"Protocol Buffers" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at https://groups.google.com/group/protobuf.
For more options, visit https://groups.google.com/d/optout.
