High mouse report rate / polling rate causes severe lag / slow down

Related: #521

Creating a new issue regarding this as I can recreate this 100% of the time.

I spent a few hours trying to work out why my PC couldn't handle running desmume, but it turns out it was because of this issue.

My specs:
CPU: AMD Ryzen 5900x
GPU: Nvidia 3070ti
Memory: 32gb
OS: Windows 11 10.0.22631 Build 22631

Can recreate this yourself by simply adjusting the polling rate of your mouse to 1000 or something high and then click + dragging for input (i.e. running in Phantom Hourglass)

Please see:

output.webm

Console:

DeSmuME 0.9.14 git#25cbcd2 x64-JIT SSE2
- compiled: Sep  3 2023 10:07:49

DirectX Input:
   - gamecontrol successfully inited: Bluetooth XINPUT-compatible input device
Microphone successfully inited.
DeSmuME 0.9.14 git#25cbcd2 x64-JIT SSE2
Attempting change to 3d core to: SoftRasterizer
SoftRasterizer: Running using 24 additional threads. (Multithreading enabled.)

ROM game code: AZEE
ROM crc: 8B431C41
ROM serial: NTR-AZEE-USA
ROM chipID: 00003FC2
ROM internal name: ZELDA_DS:PH
ROM developer: Nintendo

Slot1 auto-selected device type: Retail MC+ROM
Slot2 auto-selected device type: None (0xFF)
BackupDevice: size = 4 Mbit
CPU mode: JIT
JIT: max block size 100 instruction(s)
Already decrypted.
WIFI: MAC Address = 00:09:BF:12:34:56
WIFI: Emulation level is OFF.
Loading [snip] was successful
Emulation unpaused
snddx: emergency cleared sound buffer. (-11028, 0, 11270)

I also tested the same issue against older nightly releases (2022) and against the last two releases, finding the same behaviour. Also worth noting I experience the same behaviour with stock settings on a fresh install / run.

the mouse input needs to be throttled / denounced, here, perhaps?

Start at desmume/src/frontend/windows/main.cpp around line 4392 and reproduce the slowdown with a mouse polling rate of 1000 or higher while click-dragging in Phantom Hourglass. Investigate the reported mouse-input path; done means high polling rates no longer cause severe lag or slowdown, including on the reported Windows setup.