RoBERTa tokenization: Why do we call 'all_special_tokens' in each tokenize loop?
Is there a reason why the property function`all_special_tokens` is called in each iteration in `tokenize()` when looping over all tokens?

When I initialize a new variable and call `all_special_tokens` only once in the tokenizer init, the tokenization is speed-up around 2~3 times for me.