imnodes VS PresentMon

What ImGui library did you use to create the node graph? https://github.com/Nelarius/imnodes?

it is! used this lib imnodes although it just manages UI part, the graph itself is a custom implementation since I wanted to be able to process those through my own threading system and things like that

Like this? https://github.com/Nelarius/imnodes

Node editor examples https://github.com/Nelarius/imnodes https://github.com/paceholder/nodeeditor

Use PresentMon to figure out if it's a CPU or GPU issue. (GPUBusy)

EDIT - Intel's Presentmon has a "gpu busy" metric kinda designed to tell you if the gpu is waiting on the rest of the system and it's platform independent so should work with amd/nvidia stuff. https://game.intel.com/story/intel-presentmon/

You can also check the presentation latency with PresentMon

Borderless for DX12 and Vulkan games has no input delay. In fact those APIs don't have exclusive fullscreen support anymore. Why would the engineers who designed those get rid of "exclusive fullscreen" support if it wasn't useful? In fact most new games which offer a "fullscreen" option are faking it, you can use PresentMon to see which DXGI presentation mode is being used.

This behaviour can be monitored using PresentMon (best used on a second display) as well. This new DXGI layer would appear as Composed: Flip, Hardware: Independent Flip, or Hardware Composed: Independent Flip, while classic methods would appear as Hardware: Legacy Flip (if FSE was engaged) or Composed: Copy with GPU GDI.