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Analysis
Only a constant amount of work is required for the transposition of each character so it requires no more time than a substitution or One-Time pad to encrypt or decrypt. So it is proportional to the length of the message.
Storage space is greater though. (Substitutions so far have been limited to 26*26 (Vigenere table)
Transposition requires space proportional to the message itself (> or even >> 26*26)