本文详细对比了lzma和lz4两种压缩算法在压缩文件大小、压缩比率、压缩时间和解压缩时间上的表现。结果显示，lzma在压缩文件大小上占优，而lz4在压缩比率和压缩速度上更胜一筹。
lzma和lz4速度比较
Compressed file size in bytes
|
| gzip | bzip2 | lzma | lzma -e | xz | xz -e | lz4 | lzop |
| 1 | 124875819 (120M) | 93997047 (90M) | 85618192 (82M) | 72042179 (69M) | 85630688 (82M) | 72069084 (69M) | 165844264 (159M) | 168012430 (161M) |
| 2 | 119040249 (114M) | 87741348 (84M) | 81480824 (78M) | 70264395 (68M) | 81492504 (78M) | 70282944 (68M) | 165844264 (159M) | 166987891 (160M) |
| 3 | 114931686 (110M) | 84816957 (81MB) | 79575087 (76MB) | 69015118 (66MB) | 79586568 (76MB) | 69029204 (66MB) | 165844264 (159M) | 166987891 (160M) |
| 5 | 102328357 (98M) | 81837328 (79M) | 69557610 (67M) | 67879362 (65M) | 69583428 (67M) | 67875988 (65M) | - | 166987891 (160M) |
| 7 | 100128597 (96M) | 80197758 (77M) | 67276420 (65M) | 66868212 (64M) | 67294092 (65M) | 66852780 (64M) | - | 116205578 (111M) |
| 9 | 99740486 (96M) | 78963640 (76M) | 65841213 (63M) | 65362226 (63M) | 65859432 (63M) | 65372696 (63M) | - | 114824102 (110M) |
|
| gzip | bzip2 | lzma | lzma -e | xz | xz -e | lz4 | lzop |
可以看出lzma的压缩大小比lz4小。所以加载lzma的速度会快，lz4的速度会慢
Compression ratio
|
| gzip | bzip2 | lzma | lzma -e | xz | xz -e | lz4 | lzop |
| 1 | 26.8% | 20.2% | 18.4% | 15.5% | 18.4% | 15.5% | 35.6% | 36.0% |
| 2 | 25.5% | 18.8% | 17.5% | 15.1% | 17.5% | 15.1% | 35.6% | 35.8% |
| 3 | 24.7% | 18.2% | 17.1% | 14.8% | 17.1% | 14.8% | 35.6% | 35.8% |
| 5 | 22.0% | 17.6% | 14.9% | 14.6% | 14.9% | 14.6% | - | 35.8% |
| 7 | 21.5% | 17.2% | 14.4% | 14.3% | 14.4% | 14.3% | - | 24.9% |
| 9 | 21.4% | 16.9% | 14.1% | 14.0% | 14.1% | 14.0% | - | 24.6% |
|
| gzip | bzip2 | lzma | lzma -e | xz | xz -e | lz4 | lzop |
压缩比这里lzma大概再17%左右，lz4再35%左右，所以压缩率lz4会高
Compression time
|
| gzip | bzip2 | lzma | lzma -e | xz | xz -e | lz4 | lzop |
| 1 | 8.1s | 58.3s | 31.7s | 4m37s | 32.2s | 4m40s | 1.3s | 1.6s |
| 2 | 8.5s | 58.4s | 40.7s | 4m49s | 41.9s | 4m53s | 1.4s | 1.6s |
| 3 | 9.6s | 59.1s | 1m2s | 4m36s | 1m1s | 4m39s | 1.3s | 1.5s |
| 5 | 14s | 1m1s | 3m5s | 5m | 3m6s | 4m53s | - | 1.5s |
| 7 | 21s | 1m2s | 4m14s | 5m52s | 4m13s | 5m57s | - | 35s |
| 9 | 33s | 1m3s | 4m48s | 6m40s | 4m51s | 6m40s | - | 1m5s |
|
| gzip | bzip2 | lzma | lzma -e | xz | xz -e | lz4 | lzop |
压缩时间lzma会远远高于lz4.
Decompression time
|
| gzip | bzip2 | lzma | lzma -e | xz | xz -e | lz4 | lzop |
| 1 | 3.5s | 3.4s | 6.7s | 5.9s | 7.2s | 6.5s | 0.4s | 1.5s |
| 2 | 3s | 15.7 | 6.3s | 5.6s | 6.8s | 6.3s | 0.3s | 1.4s |
| 3 | 3.2s | 15.9s | 6s | 5.6s | 6.7s | 6.2s | 0.4s | 1.4s |
| 5 | 3.2s | 16s | 5.5s | 5.4s | 6.2s | 6s | - | 1.5s |
| 7 | 3s | 15s | 5.3s | 5.3s | 5.9s | 5.8s | - | 1.3s |
| 9 | 3s | 15s | 5s | 5.1s | 5.6s | 5.6s | - | 1.2s |
|
| gzip | bzip2 | lzma | lzma -e | xz | xz -e | lz4 | lzop |
解压缩时间也是。所以可以得知lzma的解压缩时间比lz4慢。lz4的解压缩时间比较快。
所以总结是lzma的解加载速度比较快，lz4的解压缩时间比较快。但是从压缩比和速度来看lz4会更优
参考：https://blog.youkuaiyun.com/leilonghao/article/details/73200859
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