Sensitivity drops when using SetWindowsHookEx - c++

Question

When I put the hook on the mouse, I periodically lose sensitivity, it increases by ~0.3 seconds (approximately twice). How can I fix this?
My handler code:
LRESULT CALLBACK mouseProc(int Code, WPARAM wParam, LPARAM lParam){
MOUSEHOOKSTRUCT* pMouseStruct = (MOUSEHOOKSTRUCT*)lParam;
if (pMouseStruct != nullptr) {
switch (wParam) {
case WM_LBUTTONDOWN:
std::cout << "WM_LBUTTONDOWN";
break;
case WM_LBUTTONUP:
std::cout << "WM_LBUTTONUP";
break;
case WM_RBUTTONDOWN:
std::cout << "WM_RBUTTONDOWN";
break;
case WM_RBUTTONUP:
std::cout << "WM_RBUTTONUP";
break;
default:
break;
}
}
return CallNextHookEx(NULL, Code, wParam, lParam);}
I put the hook this way:
HHOOK hook = SetWindowsHookEx(WH_MOUSE_LL, mouseProc, NULL, 0);
MSG message;
while (GetMessage(&message, NULL, 0, 0) > 0)
{
TranslateMessage(&message);
DispatchMessage(&message);
}
UnhookWindowsHookEx(hook);

Answer 1

You lose sensitivity in this code, because std::cout is very slow. You need a very quick response for this hooking or you obviously lose sensitivity.
If you really need to log in your hook, use something like spdlog and log everything asynchronously.
In addition, as Richard mentioned in comments, you need something like this at start of your hook:
if (nCode < 0) // do not process message
return CallNextHookEx(hhook, nCode, wParam, lParam);