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More hyperfine measurements

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Marcus Holland-Moritz 2020-11-23 21:40:45 +01:00
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@ -431,6 +431,49 @@ spent by the file system process:
Ignore the real time here, that's just how long it took for me to
unmount the file system again after performing the test.
I've repeated these tests using [hyperfine](https://github.com/sharkdp/hyperfine)
to make sure the measurements are consistent. Here are the results
for the *initial* run:
Benchmark #1: dwarfs-zstd
Time (mean ± σ): 1.918 s ± 0.345 s [User: 1.208 s, System: 2.050 s]
Range (min … max): 1.577 s … 2.344 s 10 runs
Benchmark #2: dwarfs-lzma
Time (mean ± σ): 14.027 s ± 0.113 s [User: 1.458 s, System: 2.544 s]
Range (min … max): 13.892 s … 14.234 s 10 runs
Benchmark #3: squashfs-zstd
Time (mean ± σ): 2.671 s ± 0.018 s [User: 1.506 s, System: 14.789 s]
Range (min … max): 2.640 s … 2.709 s 10 runs
Summary
'dwarfs-zstd' ran
1.39 ± 0.25 times faster than 'squashfs-zstd'
7.31 ± 1.32 times faster than 'dwarfs-lzma'
DwarFS is consistently faster here than SquashFS when using zstd
compression.
For *subsequent* runs, there is essentially no significant difference:
Benchmark #1: dwarfs-zstd
Time (mean ± σ): 671.5 ms ± 16.0 ms [User: 1.448 s, System: 2.360 s]
Range (min … max): 656.2 ms … 712.9 ms 10 runs
Benchmark #2: dwarfs-lzma
Time (mean ± σ): 653.0 ms ± 23.7 ms [User: 1.429 s, System: 2.243 s]
Range (min … max): 587.9 ms … 668.4 ms 10 runs
Benchmark #3: squashfs-zstd
Time (mean ± σ): 638.5 ms ± 7.4 ms [User: 1.483 s, System: 2.415 s]
Range (min … max): 629.6 ms … 657.4 ms 10 runs
Summary
'squashfs-zstd' ran
1.02 ± 0.04 times faster than 'dwarfs-lzma'
1.05 ± 0.03 times faster than 'dwarfs-zstd'
Another real-life test was to build and test a Perl module with 468
different Perl versions in the compressed file system. The module I've
used, [Tie::Hash::Indexed](https://github.com/mhx/Tie-Hash-Indexed),