Rendertime per frame increases

[dweyel]

Hey, this is something that i noticed recently. For example i have to render a sequence and normally each frame takes about 1 minute to render. But after 30 frames, each frame suddenly takes longer and after a while takes almost 3 minutes. When i stop the rendering and start at the last frame that took 3 minutes, it's back to 1 minute again. What could be causing this increase in rendertime - or am i missing smething here and this is normal? Can't remember whitnessing this behavior with other engines though. Thanks...

[dweyel]

The scene uses 1 4K displacement map (no animated texture) and an alembic point cache (around 4 mio. points)onto which i scatter some cubes as particles. Also 1 tree model and 3 rock models from megascans without displacement.Maybe someone else encountered the same behaviour and can give me a hint as to what might be causing this?

[aoktar]

You need to do some invistigation to have more ideas.
Test it with a different renderer.
Test it with different frame range.
Check your gpu usages
But first check render logs for render statistics