Slax author's Blog (RSS)
24
August2012
Squashfs benchmarks
Before I choose the right block size and compression method for Slax filesystems, I always need to do some benchmarks. Today, I took a 100MB filesystem consisting of linux kernel (already compressed) and driver modules (not compressed), which is IMHO ideal sample for benchmarks.
I will write another blog post with conclusions based on the results mentioned below.
| format | block size | uncompressed size | compressed size | ratio |
| gz | 64 | 109 189 120 | 36 491 264 | 33,42% |
| gz | 128 | 109 189 120 | 36 159 488 | 33,12% |
| gz | 256 | 109 189 120 | 36 036 608 | 33,00% |
| gz | 512 | 109 189 120 | 35 995 648 | 32,97% |
| gz | 1024 | 109 189 120 | 35 966 976 | 32,94% |
| lzma2 | 64 | 109 189 120 | 31 473 664 | 28,82% |
| lzma2 | 128 | 109 189 120 | 30 445 568 | 27,88% |
| lzma2 | 256 | 109 189 120 | 29 712 384 | 27,21% |
| lzma2 | 512 | 109 189 120 | 29 089 792 | 26,64% |
| lzma2 | 1024 | 109 189 120 | 28 549 120 | 26,15% |
| format | block size | time for reading |
| gz | 64 | 16.698 |
| gz | 128 | 16.608 |
| gz | 256 | 16.526 |
| gz | 512 | 16.507 |
| gz | 1 024 | 16.416 |
| lzma2 | 64 | 18.638 |
| lzma2 | 128 | 18.558 |
| lzma2 | 256 | 18.453 |
| lzma2 | 512 | 18.282 |
| lzma2 | 1 024 | 18.261 |
| format | block size | RAM for mount (KB) |
| gz | 64 | 792 |
| gz | 128 | 2 224 |
| gz | 256 | 1 292 |
| gz | 512 | 2 196 |
| gz | 1 024 | 5 204 |
| lzma2 | 64 | 1 028 |
| lzma2 | 128 | 1 436 |
| lzma2 | 256 | 2 256 |
| lzma2 | 512 | 2 864 |
| lzma2 | 1 024 | 6 336 |
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