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Wan2.2 TI2V-5B

Wan2.2 TI2V-5B is the 5B dense text-to-video path in Sol-Engine. The optimized configuration runs single-GPU with kernel fusion and EasyCache.

Speed

Full optimization uses lossless kernel fusion + EasyCache and reaches 2.885x speedup (70.25s → 24.35s). Measured on a single GB200 with 704x1280, 121 frames, 50 denoising steps (guidance 5.0), warmup excluded, 5-prompt median.

The line decomposes multiplicatively: lossless kernel fusion 1.52x × EasyCache (~47% of steps reused) 1.90x.

Launch

# baseline (vanilla WanPipeline, single GPU)
bash scripts/wan5b/run_baseline.sh

# optimized (~24.35s, 2.885x)
bash scripts/wan5b/run_optimized.sh

Techniques

  • Cache: EasyCache reuses denoising work (threshold 0.036).
  • Kernel fusion: regional torch.compile, QKV merge, cross-attention K/V cache, BF16 block glue — algorithmically exact (no approximation).