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ilyakurdyukov / crzy64 Public

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An easy to decode base64 modification.

BSD-2-Clause License
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ilyakurdyukov benchmark sample, fixed typo in comments
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benchmark sample, fixed typo in comments
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LICENSE
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Dec 21, 2021
Makefile
optimized encoder (fast64, sse2, ssse3)
Dec 21, 2021
README.md
benchmark sample, fixed typo in comments
Dec 21, 2021
bench.c
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Dec 21, 2021
crzy64.h
benchmark sample, fixed typo in comments
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crzy64 An easy to decode base64 modification. Build Benchmark

README.md

 crzy64

 An easy to decode base64 modification.

This is a base64 modification designed to simplify the decoding step.

For the four encoded bytes, it only takes 12 operations (+ - & ^ <<
>>) to convert them to 24 bits of data. Using 64-bit or vector
instructions makes decoding even more efficient.

But it's bound to ASCII character codes and will not work with other
encodings like EBCDIC.

There is a difference with base64 as it uses "./" instead of "+/" and
the data is also pre-shuffled to speed up decoding.

 Build

$ make all check

 Benchmark

$ make bench
./crzy64_bench
vector: ssse3
fast64: yes
size: 100 MB

memcpy: 8.592ms
memcpy: 8.562ms
memcpy: 8.565ms
memcpy: 8.542ms
memcpy: 9.144ms

encode: 28.767ms
encode: 28.806ms
encode: 28.818ms
encode: 28.572ms
encode: 28.627ms

decode: 16.798ms
decode: 16.410ms
decode: 16.526ms
decode: 16.701ms
decode: 16.286ms

About

An easy to decode base64 modification.

Topics

base64

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Readme

License

BSD-2-Clause License

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24 stars

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  * C 96.1%
  * Makefile 3.9%

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