When use RADV_EXPERIMENTAL=heap VKD3D_CONFIG=descriptor_heap，fsr4.1 speed will decrease 0.2 ms（1440p）.This issue seems to occur only with FSR 4.1; XeSS is unaffected.
heap off

heap on

Software information

final fantasy vii rebirth, But other DX12 games have this same issue as well.

System information

• GPU:AMD Radeon RX 6800 XT
• Driver:Mesa 26.1.6-arch3.1
• Wine version:cachyos-11.0-20260703-slr
• VKD3D-Proton version: 3.1

Log files

steam-default.log