On Tue, Apr 12, 2011 at 07:50:00AM +1000, Ross Moore wrote:

>  Besides, by using only 64 of the 256 possible byte codes, the base64
>  version can be up to 4 times the size of the binary version.

256 (1 byte): 8 bit 
64: 6 bit

Thus one original byte needs
  1 byte (6 bit)
+ 1/3 byte (2 bit)
for encoding.
Additional fill bytes at the end and line breaks may cost some more
bytes.

Yours sincerely
  Heiko Oberdiek


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