Supersnappy
Supersnappy is a pure Nim implementation of Google's Snappy compression algorithm. The goal of this library is to be small, straightforward, dependency-free and highly performant.
Supersnappy works well using Nim's relatively new --gc:arc and --gc:orc as well as the default garbage collector. This library also works using both nim c and nim cpp, in addition to --cc:vcc on Windows.
Performance
Benchmarks can be run comparing different Snappy implementations. My benchmarking shows this library performs significantly better in all cases than alternatives. Check the performance yourself by running tests/benchmark.nim.
nim c --gc:arc -d:release -r .\tests\benchmark.nim (1000 compress-uncompress cycles, lower time is better)
https://github.com/guzba/supersnappy results:
| File | Time |
|---|---|
| alice29.txt | 0.6039s |
| asyoulik.txt | 0.5306s |
| fireworks.jpg | 0.0213s |
| geo.protodata | 0.1473s |
| html | 0.1594s |
| html_x_4 | 0.6427s |
| kppkn.gtb | 0.4949s |
| lcet10.txt | 1.6042s |
| paper-100k.pdf | 0.0656s |
| plrabn12.txt | 2.1893s |
| urls.10K | 1.8366s |
https://github.com/jangko/snappy results:
| File | Time |
|---|---|
| alice29.txt | 2.1374s |
| asyoulik.txt | 1.8228s |
| fireworks.jpg | 0.0333s |
| geo.protodata | 0.6090s |
| html | 0.6099s |
| html_x_4 | 2.4634s |
| kppkn.gtb | 1.6288s |
| lcet10.txt | 5.6983s |
| paper-100k.pdf | 0.0905s |
| plrabn12.txt | 7.3254s |
| urls.10K | 7.9783s |
https://github.com/NimCompression/nimsnappyc results:
| File | Time |
|---|---|
| alice29.txt | 0.7838s |
| asyoulik.txt | 0.6805s |
| fireworks.jpg | 0.0250s |
| geo.protodata | 0.2246s |
| html | 0.2408s |
| html_x_4 | 0.9641s |
| kppkn.gtb | 0.6498s |
| lcet10.txt | 2.1042s |
| paper-100k.pdf | 0.0879s |
| plrabn12.txt | 2.6987s |
| urls.10K | 2.5136s |
Testing
nimble test
Credits
This implementation was heavily influenced by snappy-c.
