Reordering Members to Shrink a Struct

A market-data feed handler stores every tick in the struct below. The record is written and read millions of times per second, so its size directly determines cache footprint and memory bandwidth.

#include <cstdint>

struct Tick {
    char         side;    // 'B' for buy, 'S' for sell
    double       price;
    std::int32_t qty;
    char         flags;
};

struct TickReordered {
    double       price;
    std::int32_t qty;
    char         side;
    char         flags;
};

Assume a typical 64-bit platform (for example x86-64 Linux with gcc or clang): sizeof(char) == 1, sizeof(std::int32_t) == 4 with alignof(std::int32_t) == 4, and sizeof(double) == 8 with alignof(double) == 8. No packing pragmas or attributes are in effect.

What are sizeof(Tick) and sizeof(TickReordered)?