C++ `noexcept` keyword experiment with PSRayTracing

CMakeLists.txt

option(WITH_NOEXCEPT "Use the `noexcept` annotation for various functions (faster?)" OFF)

# ...

if (WITH_NOEXCEPT)
  message(STATUS "Using `noexcept` annotations (faster?)")
  target_compile_definitions(PSRayTracing_StaticLibrary PUBLIC USE_NOEXCEPT)
else()
  message(STATUS "Turned off use of `noexcept` (slower?)")
endif()

Common.hpp

#ifdef USE_NOEXCEPT
    #define NOEXCEPT noexcept
#else
    #define NOEXCEPT
#endif

find_index.cpp

int find_index_plain(const vector<int> &numbers, const int x)
{
  for (int i = 0; i < numbers.size(); i++)
  {
    if (numbers[i] == x)
    {
      return i;
    }
  }

  return -1;
}


int find_index_noexcept(const vector<int> &numbers, const int x) noexcept
{
  for (int i = 0; i < numbers.size(); i++)
  {
    if (numbers[i] == x)
    {
      return i;
    }
  }

  return -1;
}

find_index_noexcept.asm

find_index_noexcept(std::vector<int, std::allocator<int> > const&, int):
        mov     rax, QWORD PTR [rdi+8]
        mov     rdx, QWORD PTR [rdi]
        mov     rcx, rax
        sub     rcx, rdx
        sar     rcx, 2
        cmp     rax, rdx
        je      .L13
        xor     eax, eax
        jmp     .L12
.L15:
        add     rax, 1
        cmp     rax, rcx
        jnb     .L13
.L12:
        cmp     esi, DWORD PTR [rdx+rax*4]
        jne     .L15
        ret
.L13:
        mov     eax, -1
        ret

find_index_plain.asm

find_index_plain(std::vector<int, std::allocator<int> > const&, int):
        mov     rax, QWORD PTR [rdi+8]
        mov     rdx, QWORD PTR [rdi]
        mov     rcx, rax
        sub     rcx, rdx
        sar     rcx, 2
        cmp     rax, rdx
        je      .L5
        xor     eax, eax
        jmp     .L4
.L8:
        add     rax, 1
        cmp     rax, rcx
        jnb     .L5
.L4:
        cmp     DWORD PTR [rdx+rax*4], esi
        jne     .L8
        ret
.L5:
        mov     eax, -1
        ret

use_of_noexcept.cpp

// This is merely a snippet.  Doing a `rg NOEXCEPT | wc -l` yields at least 450 results.

Objects/Sphere.cpp
12:inline void sphere_get_uv(const Vec3 &p, rreal &u, rreal &v) NOEXCEPT {
21:Sphere::Sphere(const Vec3 &cen, const rreal r, const shared_ptr<IMaterial> &mat) NOEXCEPT :
27:shared_ptr<IHittable> Sphere::deep_copy() const NOEXCEPT {
40:) const NOEXCEPT {
122:) const NOEXCEPT {
128:rreal Sphere::pdf_value(RandomGenerator &rng, const Vec3 &origin, const Vec3 &v) const NOEXCEPT {
142:Vec3 Sphere::random(RandomGenerator &rng, const Vec3 &origin) const NOEXCEPT {

Objects/ConstantMedium.cpp
14:) NOEXCEPT :
24:) NOEXCEPT :
30:std::shared_ptr<IHittable> ConstantMedium::deep_copy() const NOEXCEPT {
38:bool ConstantMedium::hit(RandomGenerator &rng, const Ray &r, const rreal t_min, const rreal t_max, HitRecord &rec) const NOEXCEPT {
72:bool ConstantMedium::bounding_box(const rreal t0, const rreal t1, AABB &output_box) const NOEXCEPT {

Objects/Transform/FlipFace.cpp
6:shared_ptr<IHittable> FlipFace::deep_copy() const NOEXCEPT {
10:bool FlipFace::hit(RandomGenerator &rng, const Ray &r, const rreal t_min, const rreal t_max, HitRecord &rec) const NOEXCEPT {
18:bool FlipFace::bounding_box(const rreal t0, const rreal t1, AABB &output_box) const NOEXCEPT {

Objects/Transform/Translate.hpp
13:    explicit Translate(const std::shared_ptr<IHittable> &obj, const Vec3 &displacement) NOEXCEPT;
15:    std::shared_ptr<IHittable> deep_copy() const NOEXCEPT override;
17:    bool hit(RandomGenerator &rng, const Ray &r, const rreal t_min, const rreal t_max, HitRecord &rec) const NOEXCEPT override;
18:    bool bounding_box(const rreal t0, const rreal t1, AABB &output_box) const NOEXCEPT override;
24:    ) const NOEXCEPT override {
31:    ) const NOEXCEPT override {

Objects/HittableList.cpp
8:HittableList::HittableList(const shared_ptr<IHittable> &object) NOEXCEPT {
12:shared_ptr<IHittable> HittableList::deep_copy() const NOEXCEPT {
23:void HittableList::clear() NOEXCEPT {
27:void HittableList::add(const shared_ptr<IHittable> &object) NOEXCEPT {
31:bool HittableList::hit(RandomGenerator &rng, const Ray &r, const rreal t_min, const rreal t_max, HitRecord &rec) const NOEXCEPT {
53:) const NOEXCEPT {
73:rreal HittableList::pdf_value(RandomGenerator &rng, const Vec3 &origin, const Vec3 &v) const NOEXCEPT {
84:Vec3 HittableList::random(RandomGenerator &rng, const Vec3 &origin) const NOEXCEPT {