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I googled and could not find much information on Base94 encoding. Does anyone has more details about this encoding?
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Base64 encoding schemes are commonly used when there is a need to encode binary data that needs to be stored and transferred over media that are designed to deal with ASCII. This is to ensure that the data remain intact without modification during transport.
Base64 is an encoding and decoding technique used to convert binary data to an American Standard for Information Interchange (ASCII) text format, and vice versa.
In base64 encoding, the character set is [A-Z, a-z, 0-9, and + /] . If the rest length is less than 4, the string is padded with '=' characters. ^([A-Za-z0-9+/]{4})* means the string starts with 0 or more base64 groups.
How fast can you decode base64 data? On a recent Intel processor, it takes roughly 2 cycles per byte (from cache) when using a fast decoder like the one from the Chrome browser.
Essentially: Base94 encoding takes 9 input bytes of 8 bits each, uses those to construct a 72-bit integer, and then converts that to an 11-digit base-94 number, and encodes that number using the ASCII characters ! (33) through ~ (126).
Here is some example code that someone published on GitHub:
https://gist.github.com/iso2022jp/4054241
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