enum ProfileScopeName {
  ProfileScopeName_draw_triangle,
  ProfileScopeName_Count,
};

struct ProfileScope {
  U64 samples[5096*16];
  S64 i;
};

global ProfileScope profile_scopes[ProfileScopeName_Count];

#define PROFILE_BEGIN(name)                                                              \
  do {                                                                                   \
    ProfileScope *__profile_scope = profile_scopes + ProfileScopeName_##name;            \
    __profile_scope->samples[__profile_scope->i] = __rdtsc();                            \
  } while (0)

#define PROFILE_END(name)                                                                \
  do {                                                                                   \
    ProfileScope *_profile_scope = profile_scopes + ProfileScopeName_##name;             \
    _profile_scope->samples[_profile_scope->i] =                                         \
        __rdtsc() - _profile_scope->samples[_profile_scope->i];                          \
    _profile_scope->i = (_profile_scope->i + 1) % 5096*16;                                  \
  } while (0)