Add LTX23_VAE_TILING, LTX23_DECODE (output_type=latent to skip VAE decode),
and LTX23_WARMUP/LTX23_MEASURED env knobs to the t2v bench harness so long /
high-res runs (241/481 frames) can be measured. output_type=latent lets us
time the DiT (denoise/refine) cleanly without the slow CPU-bound tiled VAE
decode dominating wall-time.
Update INSTRUCTION_ltx23_nvfp4.md: document the new knobs, add a long-token
scaling section (121/241/481-frame nvfp4-vs-bf16 numbers; refine attention N²
crossover), and correct the tiling/decode notes.
alexzms
5671ebc718