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A drop-in replacement of Golang's base64 implementation with SIMD acceleration.
ci arm64 ppc64le s390x loong64 codecov Go Report Card Documentation GitHub go.mod Go version (branch) Release
- AMD64 SSE/AVX/AVX2
- ARM64 NEON
- PPC64X
- S390X
- LOONG64 LSX
SDK vs. Purego:
goos: windows
goarch: amd64
pkg: github.com/emmansun/base64
cpu: Intel(R) Core(TM) i5-9500 CPU @ 3.00GHz
│ sdk.txt │ purego.txt │
│ sec/op │ sec/op vs base │
EncodeToString-6 11.774μ ± 2% 9.267μ ± 1% -21.29% (p=0.000 n=10)
DecodeString/2-6 31.80n ± 0% 28.63n ± 1% -9.97% (p=0.000 n=10)
DecodeString/4-6 35.00n ± 1% 32.89n ± 2% -6.02% (p=0.000 n=10)
DecodeString/8-6 41.85n ± 1% 39.97n ± 2% -4.48% (p=0.000 n=10)
DecodeString/64-6 154.7n ± 1% 112.0n ± 2% -27.61% (p=0.000 n=10)
DecodeString/8192-6 12.630μ ± 1% 9.836μ ± 1% -22.12% (p=0.000 n=10)
geomean 319.9n 269.6n -15.71%
│ sdk.txt │ purego.txt │
│ B/s │ B/s vs base │
EncodeToString-6 663.6Mi ± 2% 843.1Mi ± 1% +27.05% (p=0.000 n=10)
DecodeString/2-6 120.0Mi ± 0% 133.2Mi ± 1% +11.06% (p=0.000 n=10)
DecodeString/4-6 218.0Mi ± 1% 232.0Mi ± 2% +6.39% (p=0.000 n=10)
DecodeString/8-6 273.5Mi ± 1% 286.3Mi ± 2% +4.69% (p=0.000 n=10)
DecodeString/64-6 542.8Mi ± 1% 749.7Mi ± 2% +38.12% (p=0.000 n=10)
DecodeString/8192-6 824.8Mi ± 1% 1059.2Mi ± 1% +28.41% (p=0.000 n=10)
geomean 358.6Mi 425.4Mi +18.63%
Purego vs. AVX:
goos: windows
goarch: amd64
pkg: github.com/emmansun/base64
cpu: Intel(R) Core(TM) i5-9500 CPU @ 3.00GHz
│ purego.txt │ avx.txt │
│ sec/op │ sec/op vs base │
EncodeToString-6 9.267μ ± 1% 3.201μ ± 2% -65.46% (p=0.000 n=10)
DecodeString/2-6 28.63n ± 1% 27.95n ± 1% -2.38% (p=0.000 n=10)
DecodeString/4-6 32.89n ± 2% 32.34n ± 1% -1.67% (p=0.041 n=10)
DecodeString/8-6 39.97n ± 2% 39.12n ± 0% -2.14% (p=0.000 n=10)
DecodeString/64-6 111.95n ± 2% 69.97n ± 2% -37.50% (p=0.000 n=10)
DecodeString/8192-6 9.836μ ± 1% 3.227μ ± 2% -67.20% (p=0.000 n=10)
Encode-6 1.003μ ± 1%
Decode-6 1.547μ ± 4%
geomean 269.6n 281.7n -36.35%
│ purego.txt │ avx.txt │
│ B/s │ B/s vs base │
EncodeToString-6 843.1Mi ± 1% 2441.1Mi ± 2% +189.54% (p=0.000 n=10)
DecodeString/2-6 133.2Mi ± 1% 136.5Mi ± 1% +2.44% (p=0.000 n=10)
DecodeString/4-6 232.0Mi ± 2% 235.9Mi ± 1% +1.70% (p=0.045 n=10)
DecodeString/8-6 286.3Mi ± 2% 292.6Mi ± 0% +2.20% (p=0.000 n=10)
DecodeString/64-6 749.7Mi ± 2% 1199.5Mi ± 2% +60.00% (p=0.000 n=10)
DecodeString/8192-6 1.034Gi ± 1% 3.153Gi ± 2% +204.83% (p=0.000 n=10)
Encode-6 7.612Gi ± 1%
Decode-6 6.578Gi ± 3%
geomean 425.4Mi 1.184Gi +57.10%
AVX vs. AVX2:
goos: windows
goarch: amd64
pkg: github.com/emmansun/base64
cpu: Intel(R) Core(TM) i5-9500 CPU @ 3.00GHz
│ avx.txt │ avx2.txt │
│ sec/op │ sec/op vs base │
Encode-6 1002.5n ± 1% 495.1n ± 1% -50.62% (p=0.000 n=10)
Decode-6 1546.5n ± 4% 640.7n ± 1% -58.57% (p=0.000 n=10)
EncodeToString-6 3.201μ ± 2% 2.683μ ± 5% -16.18% (p=0.000 n=10)
DecodeString/2-6 27.95n ± 1% 27.82n ± 1% ~ (p=0.289 n=10)
DecodeString/4-6 32.34n ± 1% 32.28n ± 1% ~ (p=0.494 n=10)
DecodeString/8-6 39.12n ± 0% 39.45n ± 1% +0.84% (p=0.034 n=10)
DecodeString/64-6 69.97n ± 2% 67.69n ± 1% -3.24% (p=0.000 n=10)
DecodeString/8192-6 3.227μ ± 2% 2.187μ ± 3% -32.23% (p=0.000 n=10)
geomean 281.7n 214.4n -23.89%
│ avx.txt │ avx2.txt │
│ B/s │ B/s vs base │
Encode-6 7.612Gi ± 1% 15.412Gi ± 1% +102.46% (p=0.000 n=10)
Decode-6 6.578Gi ± 3% 15.878Gi ± 1% +141.37% (p=0.000 n=10)
EncodeToString-6 2.384Gi ± 2% 2.844Gi ± 5% +19.31% (p=0.000 n=10)
DecodeString/2-6 136.5Mi ± 1% 137.1Mi ± 1% ~ (p=0.315 n=10)
DecodeString/4-6 235.9Mi ± 1% 236.4Mi ± 1% ~ (p=0.529 n=10)
DecodeString/8-6 292.6Mi ± 0% 290.1Mi ± 1% -0.84% (p=0.035 n=10)
DecodeString/64-6 1.171Gi ± 2% 1.211Gi ± 1% +3.35% (p=0.000 n=10)
DecodeString/8192-6 3.153Gi ± 2% 4.653Gi ± 3% +47.58% (p=0.000 n=10)
geomean 1.184Gi 1.556Gi +31.38%
This is an extension of golang base64.
The amd64 (especially SSE version) / arm64 SIMD implementation are inspired by code from aklomp/base64.