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[PERF] Use faster way of decode in tokenizer: avoid useless list-to-list conversion #20000

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Merged
merged 1 commit into from
Aug 2, 2025
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[PERF] Use faster way of decode in tokenizer: avoid useless list-to-list conversion #20000

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7 changes: 4 additions & 3 deletions vllm/transformers_utils/tokenizer.py
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Original file line number Diff line number Diff line change
Expand Up @@ -45,11 +45,12 @@ def decode_tokens(
`skip_special_tokens=None` means to use the backend's default
settings.
"""
decode_method = getattr(tokenizer, "_decode", tokenizer.decode)
if skip_special_tokens is not None:
return tokenizer.decode(token_ids,
skip_special_tokens=skip_special_tokens)
return decode_method(token_ids,
skip_special_tokens=skip_special_tokens)

return tokenizer.decode(token_ids)
return decode_method(token_ids)


def encode_tokens(
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