LTX 2.3 VAE DECODE UPDATED ISSUE

[tuneravent123]

Custom Node Testing

• I have tried disabling custom nodes and the issue persists (see how to disable custom nodes if you need help)

Your question

Newest comfyui Update has hard stuck my LTX 2.3 VAE DECODE SPEED when it comes to GPU usage, went from 10gb to hard stuck 6.3gb , tried all types of tricks including --gpu only but still hardstuck at 6.3gb , used the vae decode tile at 768x64x4096x12 but still hard stuck.
Before comfyui update, took only 8 sec for vae decode tile but now its stuck at 25sec.
NEED HELP!!!!

Logs

Other

No response

[rattus128]

What is your GPU?

There was a change to LTX decode recently to freed unused VRAM. We also changed the scaling of the VAE temporal slice size to scale with GPU VRAM size to avoid ooms and tiler fallbacks so we are deliberately keeping the VRAM user lower. Test data so far shows no slowdown our side and VRAM does not increase proporitionally with speed with VAE. Can I get your before and after task manager screenshots and exec logs across the update where you think it might have slowed down?

[tuneravent123]

GPU 0

NVIDIA GeForce RTX 2080 Ti

Driver version:	32.0.15.9186
Driver date:	1/20/2026
DirectX version:	12 (FL 12.1)
Physical location:	PCI bus 9, device 0, function 0

Utilization	92%
Dedicated GPU memory	6.5/11.0 GB
Shared GPU memory	0.1/20.0 GB
GPU Memory	6.7/31.0 GB

while vae decode tile is running this is from task manager....

What is your GPU?

There was a change to LTX decode recently to freed unused VRAM. We also changed the scaling of the VAE temporal slice size to scale with GPU VRAM size to avoid ooms and tiler fallbacks so we are deliberately keeping the VRAM user lower. Test data so far shows no slowdown our side and VRAM does not increase proporitionally with speed with VAE. Can I get your before and after task manager screenshots and exec logs across the update where you think it might have slowed down?

[tuneravent123]

GPU 0

NVIDIA GeForce RTX 2080 Ti

Driver version:	32.0.15.9186
Driver date:	1/20/2026
DirectX version:	12 (FL 12.1)
Physical location:	PCI bus 9, device 0, function 0

Utilization	92%
Dedicated GPU memory	6.5/11.0 GB
Shared GPU memory	0.1/20.0 GB
GPU Memory	6.7/31.0 GB

while vae decode tile is running this is from task manager....

What is your GPU?
There was a change to LTX decode recently to freed unused VRAM. We also changed the scaling of the VAE temporal slice size to scale with GPU VRAM size to avoid ooms and tiler fallbacks so we are deliberately keeping the VRAM user lower. Test data so far shows no slowdown our side and VRAM does not increase proporitionally with speed with VAE. Can I get your before and after task manager screenshots and exec logs across the update where you think it might have slowed down?