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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 Ignore the real time here, that's just how long it took for me to
unmount the file system again after performing the test. 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 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 different Perl versions in the compressed file system. The module I've
used, [Tie::Hash::Indexed](https://github.com/mhx/Tie-Hash-Indexed), used, [Tie::Hash::Indexed](https://github.com/mhx/Tie-Hash-Indexed),