CODM stutters or hitches specifically during gunfights on GameLoop PC

run-a-bot-match-to-warm-up-the-shader-cache-before-ranked (sortOrder=1, isMostHelpful)

Playing a 5–10 minute bot match before your first ranked game forces the most common shaders to compile while the stakes are low — subsequent matches use cached shaders and run stutter-free.

1. Launch GameLoop and CODM normally. Do not go straight into a ranked or multiplayer match.
2. From the main menu, start a practice vs. bots match (Multiplayer → Quick Match → Bots, or any training mode available). Choose a map that is similar to where you plan to rank (e.g., Firing Range or any standard MP map).
3. Play for 5–10 minutes. Specifically: fire as many different weapons as possible, including your planned loadout. Pick up enemy weapons mid-match to trigger their specific shader effects. Try to see kill feeds and operator effects on screen.
4. Finish or quit the bot match. The shader cache is now populated for the weapon effects and operators you encountered.
5. Enter your actual ranked or multiplayer match. Gunfight stutter should be significantly reduced or absent for the remainder of the session.

Why this works: Shader compilation stutter only happens on the first render of a specific shader in the current session. By deliberately triggering as many weapon effects as possible in a consequence-free bot match, you force the GPU driver to compile all relevant shaders before your ranked game. By the time you enter a ranked match, every common weapon effect has a compiled shader cached in GPU driver memory, so rendering is instant — no compilation stall interrupts your gunfight.

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If your GPU or CPU drops its clock speed during a gunfight (power throttling), the shader compilation takes even longer — forcing sustained performance mode prevents mid-fight clock drops.

1. Open Windows Settings → System → Power & sleep → Additional power settings. Set the power plan to High Performance or Ultimate Performance (if available). This prevents the CPU from dropping to a lower clock state during rendering.
2. For NVIDIA GPUs: open NVIDIA Control Panel → Manage 3D settings → Global Settings. Set Power management mode to Prefer maximum performance. This prevents the GPU from dropping its clock speed between frames, which would slow shader compilation.
3. For AMD GPUs: open AMD Software (Adrenalin) → Gaming → Graphics and enable Anti-Lag and set the performance target to Performance or Max rather than Balanced or Power Saving.
4. For Intel integrated graphics: open Intel Graphics Command Center → System → Power and set to Best Performance.
5. After applying power settings, restart GameLoop and CODM. The GPU will now maintain higher clock speeds throughout your session, reducing the time any shader compilation stall takes from ~300–500 ms to ~50–150 ms.

Why this works: Shader compilation is CPU- and GPU-intensive. If either is running at a reduced clock speed due to power-saving modes, compilation takes proportionally longer. A GPU running at 60% of its maximum clock speed takes ~67% longer to compile a shader than at full speed. Forcing the GPU into sustained performance mode keeps clocks elevated before, during, and after gunfights, shortening any compilation stall that does occur and making it less noticeable in practice.

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Setting GameLoop's process priority to High tells Windows to preempt other processes during shader compilation — reducing the chance that background tasks extend the stutter duration.

1. Launch GameLoop and CODM until you are in-game (in a bot match or lobby).
2. Open Task Manager (Ctrl+Shift+Esc) → Details tab.
3. Find GameLoop.exe in the list. Right-click it → Set priority → High. Confirm the prompt. Do not set it to Real-time — Real-time can cause system instability.
4. Also find any process named MobileGamePC.exe or the CODM render process (it may appear as a child of GameLoop.exe). Set its priority to High as well.
5. Note: Task Manager priority settings reset when the process is closed. To make this persistent (so it applies every session without manual steps): use a small tool such as Process Lasso (free tier) to create a permanent priority rule for GameLoop.exe.

Why this works: Windows uses process priority to decide which process gets CPU time when the CPU is busy. During a shader compilation stall, GameLoop's rendering thread is doing intensive CPU work. If a background process (antivirus scan, Windows update, Discord, Chrome) also needs CPU at that moment, Windows may preempt GameLoop to give the background process a time slice — extending the stutter from 200 ms to 400+ ms. Setting GameLoop to High priority ensures that when the CPU is contested, the shader compile finishes first before Windows attends to background tasks.

clear-the-gameloop-shader-cache-to-fix-corrupt-cached-shaders-causing-repeated-stutter (sortOrder=4)

If a specific gunfight effect stutters every session even after warming up, the cached shader may be corrupt — clearing the shader cache forces a clean re-compile that fixes it permanently.

1. Close CODM and GameLoop completely (system tray → Exit).
2. Navigate to the GameLoop shader cache folder. Common locations: C:\Program Files\GameLoop\data\cache\, C:\Users\[YourUsername]\AppData\Local\Tencent\GameLoop\, or search your PC for a folder named "shader_cache" inside the GameLoop installation directory.
3. Inside the cache folder, look for a subfolder named shader_cache, dx_cache, or gpu_cache. Delete the contents of this folder (not the folder itself). This forces the driver to recompile shaders from scratch.
4. Additionally, clear the GPU driver's own shader cache: for NVIDIA, navigate to C:\Users\[YourUsername]\AppData\Local\NVIDIA\DXCache\ and C:\Users\[YourUsername]\AppData\LocalLow\NVIDIA\PerDriverVersion\DXCache\ — delete contents. For AMD: C:\Users\[YourUsername]\AppData\Local\AMD\DxCache\.
5. Relaunch GameLoop and CODM. Run an S1 bot match warm-up. The first session will have more stutter as all shaders re-compile from scratch, but subsequent sessions will be stutter-free with a clean cache.

Why this works: GPU driver shader caches can become corrupt in several ways: a partial file write during a crash, a mismatch between an old cached shader and an updated CODM or driver version, or disk errors. When the driver loads a corrupt shader from cache instead of recompiling, it may produce rendering errors or take longer to execute than expected — causing stutter on every load of that shader, not just the first. Deleting the cache removes all stored shaders, forcing the driver to recompile each one fresh. The fresh compilation produces a valid, uncorrupted cached shader that runs at full speed for all future loads.

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If gunfight stutter appeared or worsened after a GPU driver update, the new driver may have a regression in its DirectX shader compiler — rolling back to the previous driver restores the previous behavior.

1. Note when the stutter started. If it coincides with a GPU driver update, a driver rollback is the fastest fix.
2. For NVIDIA: download the previous driver version from NVIDIA's website (select your GPU → Drivers → search for the version before the one that caused issues). Use DDU (Display Driver Uninstaller) — boot into Safe Mode, run DDU to completely remove the current driver, then install the older version. DDU prevents driver remnants from causing conflicts.
3. For AMD: download the previous Adrenalin driver package from AMD's driver archive. Run the installer and choose Clean Install. After installing the older driver, disable automatic driver updates in AMD Software to prevent the problematic version from re-installing.
4. For Intel Arc or integrated graphics: roll back via Device Manager → Display Adapters → right-click → Properties → Driver tab → Roll Back Driver (if the "Roll Back" button is available). Alternatively download the specific older version from Intel's driver download center.
5. After rolling back, run a bot match warm-up (S1) and test in a full match. If the stutter is gone, keep the older driver and pause automatic GPU driver updates until a newer driver release confirms the regression is fixed.

Why this works: GPU driver updates include changes to the DirectX shader compiler that translates CODM's shaders into native GPU instructions. Occasionally, a driver update introduces a regression in this compiler — a change that causes certain shaders (particularly the particle/effect shaders common in gunfights) to take longer to compile or to produce slightly incorrect code that the GPU executes more slowly. Rolling back to the previous driver version that was working correctly restores the previous compiler behavior, eliminating the stutter that the regression introduced.