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add use_quick_gelu kwarg for CLIPTextEncoder
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@ -131,6 +131,7 @@ class CLIPTextEncoder(Chain):
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"num_attention_heads",
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"feedforward_dim",
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"layer_norm_eps",
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"use_quick_gelu",
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"tokenizer",
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]
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@ -143,6 +144,7 @@ class CLIPTextEncoder(Chain):
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num_attention_heads: int = 12,
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feedforward_dim: int = 3072,
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layer_norm_eps: float = 1e-5,
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use_quick_gelu: bool = False,
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device: Device | str | None = None,
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dtype: DType | None = None,
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) -> None:
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@ -153,6 +155,7 @@ class CLIPTextEncoder(Chain):
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self.num_attention_heads = num_attention_heads
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self.feedforward_dim = feedforward_dim
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self.layer_norm_eps = layer_norm_eps
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self.use_quick_gelu = use_quick_gelu
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self.tokenizer = CLIPTokenizer()
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super().__init__(
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PositionalTokenEncoder(
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@ -175,6 +178,9 @@ class CLIPTextEncoder(Chain):
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),
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LayerNorm(normalized_shape=embedding_dim, eps=layer_norm_eps, device=device, dtype=dtype),
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)
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if use_quick_gelu:
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for gelu, parent in self.walk(predicate=lambda m, _: isinstance(m, GeLU)):
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parent.replace(old_module=gelu, new_module=ApproximateGeLU())
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def encode(self, text: str) -> Tensor:
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tokens = self.tokenizer(text, sequence_length=self.positional_embedding_dim).to(device=self.device)
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@ -192,6 +198,7 @@ class CLIPTextEncoderL(CLIPTextEncoder):
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num_layers=12
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num_attention_heads=12
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feedforward_dim=3072
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use_quick_gelu=True
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We replace the GeLU activation function with an approximate GeLU to comply with the original CLIP implementation
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of OpenAI (https://github.com/openai/CLIP/blob/main/clip/model.py#L166)
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@ -203,11 +210,10 @@ class CLIPTextEncoderL(CLIPTextEncoder):
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num_layers=12,
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num_attention_heads=12,
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feedforward_dim=3072,
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use_quick_gelu=True,
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device=device,
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dtype=dtype,
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)
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for gelu, parent in self.walk(predicate=lambda m, _: isinstance(m, GeLU)):
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parent.replace(old_module=gelu, new_module=ApproximateGeLU())
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class CLIPTextEncoderH(CLIPTextEncoder):
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