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Re:PruningRadixTrie – 1000x faster Radix trie for prefix sea... by ComputerGuru on Saturday September 30, 2023 @02:04PM (#37718070)
> One or two characters is almost never enough to give a meaningful result.

TFA acknowledges that and mentions the exception:

While a prefix of length=1 is not very useful for the Latin alphabet, it does make sense for CJK languages

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