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⚡️ Speed up method SD3DenoiseInvocation._prepare_cfg_scale by 17% #154

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⚡️ Speed up method SD3DenoiseInvocation._prepare_cfg_scale by 17% #154

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17 changes: 8 additions & 9 deletions invokeai/app/invocations/sd3_denoise.py
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Original file line number Diff line number Diff line change
Expand Up @@ -177,15 +177,14 @@ def _prepare_cfg_scale(self, num_timesteps: int) -> list[float]:
Returns:
list[float]: _description_
"""
if isinstance(self.cfg_scale, float):
cfg_scale = [self.cfg_scale] * num_timesteps
elif isinstance(self.cfg_scale, list):
assert len(self.cfg_scale) == num_timesteps
cfg_scale = self.cfg_scale
else:
raise ValueError(f"Invalid CFG scale type: {type(self.cfg_scale)}")

return cfg_scale
cfg_scale = self.cfg_scale
if isinstance(cfg_scale, float):
# Use list multiplication only once, avoiding repeated attribute lookups
return [cfg_scale] * num_timesteps
if isinstance(cfg_scale, list):
assert len(cfg_scale) == num_timesteps
return cfg_scale
raise ValueError(f"Invalid CFG scale type: {type(cfg_scale)}")

def _run_diffusion(
self,
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