>>>>> Andrew McGlashan <andrew.mcglas...@affinityvision.com.au> writes:
>>>>> Ivan Shmakov wrote:
>> Huh? Base64 has overhead of only 33.(3)%?
> Won't that vary by file?
I guess it won't. Base64 sends each 6-bit of data as an ASCII
character, which is (usually) represented by an octet. This
gives exactly 4 octets of output for every 3 octets of input:
(* 4 6) => 24
(* 3 8) => 24
The only variation that Base64 has is that the output is padded
to the 4-octet boundary (with up to two ='s), but the effects of
this are negligible for the files of more than a few kiB long.
> It's never going to be the same for every file.
It's not unusual to compress the files before the Base64
encoding is applied. And indeed, the compression ratio may
vary.
> It's still alot of extra overhead, not just the extra data.
Yes.
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