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An Extremely Fast Compression Algorithm.

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xrle - eXtreme Run Length Encoding

xrle is a compression algorithm inspired by RLE64 and lrrle. Compared to RLE64 and lrrle 64 bit variant,xrle is faster while having better compression ratio.

Benchmark

police.bmp

Compressor Compressed size Ratio Encoding speed Decoding speed
xrle 3827870 x40.059 7652 MB/s 5171 MB/s
RLE64 5007102 x30.624 2354 MB/s 2424 MB/s
lrrle,64 5007102 x30.624 4894 MB/s 5151 MB/s
lrrle,256 12097294 x12.676 9194 MB/s 5023 MB/s
memcpy 153339294 x 1.000 5333 MB/s -

Compile

gcc -c -O3 xrle.c -o xrle.o

For some reason clang produces unoptimized executable.See here.

License

BSD 2-Clause

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An Extremely Fast Compression Algorithm.

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  • C 98.3%
  • Makefile 1.7%