Turbo Base64:Fastest Base64 SIMD/Neon

Fastest Base64 SIMD Encoding library

• 100% C (C++ headers), as simple as memcpy.
• No other base64 library encode or decode faster
• ✨ Scalar can be faster than other SSE or ARM Neon based base64 libraries
• 🆕 (2019.12) Turbo Base64 SSE faster than other SSE/AVX/AVX2! base64 library
• 🆕 (2019.12) Fastest AVX2 implementation, damn near to memcpy
• TurboBase64 AVX2 decoding is ~2x faster than other AVX2 libs.
• 🆕 (2020.1) For short string, TurboBase64 is 3-4 times faster than other libs.
• 🆕 (2019.1) Fastest ARM Neon base64
• 👍 Dynamic CPU detection and JIT scalar/sse/avx/avx2 switching
• Base64 robust error checking, optimzed for long+short strings
• Portable library, 32/64 bits, SSE/AVX/AVX2, ARM Neon, Power9 Altivec
• OS:Linux amd64, arm64, Power9, MacOs, s390x. Windows: Mingw, visual c++
• Big+Little endian
• Ready and simple to use library, no armada of files, no hassles dependencies

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Benchmark incl. the best SIMD Base64 libs:

• with TurboBench
• Single thread
• Including base64 error checking
• Small file + realistic and practical (no PURE cache) benchmark with large binary game assets corpus pd3d.tar (20 MB)
• Unlike other benchmarks, the best of the best scalar+simd libraries are included

Benchmark Intel CPU: Skylake i7-6700 3.4GHz gcc 9.2

E Size	ratio%	E MB/s	D MB/s	Name	1MB binary 2019.12
1333336	133.3	16329	26032	TB64avx2	Turbo Base64 avx2
1333336	133.3	9920	16207	TB64avx	Turbo Base64 avx
1333336	133.3	8891	12132	TB64sse	Turbo Base64 sse
1333336	133.3	12973	13986	fb64avx2	Fastbase64 avx2
1333336	133.3	12962	13970	b64avx2	Base64 avx2
1333336	133.3	8392	8717	b64avx	Base64 avx
1333336	133.3	6899	7477	b64sse	Base64 sse41
1000000	100.0	29934	29992	memcpy

E Size	ratio%	E MB/s	D MB/s	Name	20MB binary 2019.12
26666668	133.3	8920	12706	TB64avx2	Turbo Base64 avx2
26666668	133.3	8466	12401	TB64avx	Turbo Base64 avx
26666668	133.3	8103	11291	TB64sse	Turbo Base64 sse
26666668	133.3	7795	10452	fb64avx2	Fastbase64 avx2
26666668	133.3	7809	10381	b64avx2	Base64 avx2
26666668	133.3	7161	8172	b64avx	Base64 avx
26666668	133.3	6420	7042	b64sse	Base64 sse41
26666668	133.3	3925	4281	TB64x	Turbo Base64 scalar
26666668	133.3	1840	3320	b64plain	Base64 plain
26666668	133.3	1908	2752	TB64s	Turbo Base64 scalar
26666668	133.3	1522	3198	chrome	Google Chrome base64
26666668	133.3	1871	1612	fb64plain	FastBase64 plain
26666668	133.3	1122	816	quicktime	Apple Quicktime base64
27083334	135.4	1100	178	linux	Linux base64
20000000	100.0	14432	14464	memcpy

TurboBase64 vs. Base64 for short strings (incl. checking)

String length	E MB/s	D MB/s	Name	1MB short strings 2020.01
4 - 16	1682	1843	TB64avx2	Turbo Base64 avx2
	559	622	b64avx2	Base64 avx2
8 - 32	2835	2965	TB64avx2	Turbo Base64 avx2
	838	818	b64avx2	Base64 avx2
16 - 64	4623	4893	TB64avx2	Turbo Base64 avx2
	1555	1229	b64avx2	Base64 avx2
32 - 128	7218	7533	TB64avx2	Turbo Base64 avx2
	2955	2365	b64avx2	Base64 avx2

Benchmark ARM Neon: ARMv8 A73-ODROID-N2 1.8GHz (clang 6.0)

E Size	ratio%	E MB/s	D MB/s	Name	30MB binary 2019.12
40000000	133.3	2026	1650	TB64neon	Turbo Base64 Neon
40000000	133.3	1795	1285	b64neon64	Base64 Neon
40000000	133.3	1270	1095	TB64x	Turbo Base64 scalar
40000000	133.3	695	965	TB64s	Turbo Base64 scalar
40000000	133.3	512	782	fb64neon	Fastbase64 SIMD Neon
40000000	133.3	565	460	Chrome	Google Chrome base64
40000000	133.3	642	614	b64plain	Base64 plain
40000000	133.3	506	548	fb64plain	Fastbase64 plain
40500000	135.4	314	91	Linux	Linux base64
30000000	100.0	3820	3834	memcpy

(bold = pareto in category) MB=1.000.000
(E/D) : Encode/Decode

Compile: (Download or clone Turbo Base64 SIMD)

    git clone git://github.com/powturbo/TurboBase64.git
    make

Usage: (Benchmark App)

    ./tb64app file 
    or  
    ./tb64app

Function usage:

static inline unsigned turbob64len(unsigned n)
Base64 output length after encoding

unsigned tb64enc(const unsigned char *in, unsigned inlen, unsigned char *out)
Encode binary input 'in' buffer into base64 string 'out'
with automatic cpu detection for simd and switch (sse/avx2/scalar
in : Input buffer to encode
inlen : Length in bytes of input buffer
out : Output buffer
return value: Length of output buffer
Remark : byte 'zero' is not written to end of output stream
Caller must add 0 (out[outlen] = 0) for a null terminated string

unsigned tb64dec(const unsigned char *in, unsigned inlen, unsigned char *out)
Decode base64 input 'in' buffer into binary buffer 'out'
in : input buffer to decode
inlen : length in bytes of input buffer
out : output buffer
return value: >0 output buffer length
0 Error (invalid base64 input or input length = 0)

Environment:

OS/Compiler (32 + 64 bits):

• Windows: Visual C++ (2017)
• Windows: MinGW-w64 makefile
• Linux amd/intel: GNU GCC (>=4.6)
• Linux amd/intel: Clang (>=3.2)
• Linux arm: aarch64 ARMv8 Neon: gcc (>=6.3)
• Linux arm: aarch64 ARMv8 Neon: clang (>=6.0)
• MaxOS: XCode (>=9)
• PowerPC ppc64le: gcc (>=8.0) incl. SIMD Altivec

References:

• fastbase v2019.12
• base64 v.0.4.0 2019.12
• base64simd

* SIMD Base64 publications:

• 📗Faster Base64 Encoding and Decoding Using AVX2 Instructions
• 📗RFC 4648:The Base16, Base32, and Base64 Data Encodings

Last update: 03 MAR 2020