B- FPS Limiter — Keep Your Laptop Cool & Silent in Blender 🚀

Working on a laptop? Tired of your fans screaming like a jet engine the moment you rotate the 3D viewport? Or maybe you're rocking a passively cooled ultrabook and watching your battery melt away during a basic modeling session?

Blender is incredibly powerful, but it has one bad habit: its viewport runs completely unthrottled. If you connect your laptop to a high-refresh-rate external monitor (like 144Hz or 240Hz), Blender will ruthlessly try to render every single viewport rotation at maximum FPS. The result? Instant overheating, thermal throttling, and a drained battery.

B- FPS Limiter changes the game. It injects a precise throttle directly into Blender's draw loop, giving your hardware a micro-rest between frames without disrupting your creative flow.

🔋 Why you need this addon:

• Silence Your Device: By capping the viewport to a cinematic 25 FPS (or any custom limit), you drastically reduce the load on your GPU and CPU. No more noisy fans while doing simple layout or modeling work.
• Massively Extend Battery Life: Perfect for mobile workflows. The addon uses a smart thread-sleeping mechanism, meaning your laptop stops pulling maximum wattage when it doesn't need to. Work longer on trains, in cafes, or on the couch.
• Protect Your Hardware: High temperatures (90°C–100°C) degrade your laptop’s lithium-ion battery and stress internal components. Keep your machine running at a safer and lower temperature even during complex scenes.
• Zero File Clutter: Built entirely on Blender’s WindowManager. The addon doesn’t save any junk data inside your .blend project files, keeping your production assets completely clean.

🛠️ Key Features:

• Dedicated N-Panel Tab: Easily toggle the limiter on/off and adjust your target FPS directly from the 3D Viewport sidebar (FPS Limiter tab).
• Global Startup Preferences: Set your preferred default state and target frame rate inside Blender Preferences once, and it will persist across restarts.
• Smart Frame Capping: Unlike simple timers, this draw-handler solution calculates the exact time elapsed per frame and throttles only what is necessary.
• Built-in Safety Catch: Includes a hard safety clamp (_MAX_SLEEP_S) to ensure Blender's UI stays responsive and never locks up, no matter how low you set the frame rate.

💡 Perfect for:

• Passively cooled ultrabooks (like MacBook Air) that rely on thermal management.
• Gaming laptops prone to extreme fan noise under light workloads.
• Artists using external 144Hz+ monitors who want to save precious computing power for rendering, not viewport navigation.