[Schamper]

Adds the LZRC decompression and compression algorithms.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 218 lines in your changes missing coverage. Please review.
✅ Project coverage is 0.00%. Comparing base (bc05ff3) to head (fc8eb2f).

Files with missing lines	Patch %	Lines
dissect/util/compression/lzrc.py	0.00%	218 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff           @@
##            main    #149    +/-   ##
======================================
  Coverage   0.00%   0.00%            
======================================
  Files         34      35     +1     
  Lines       2249    2467   +218     
======================================
- Misses      2249    2467   +218     

Flag	Coverage Δ
unittests	0.00% <0.00%> (ø)

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[codspeed]

Merging this PR will improve performance by 24.91%

2 warnings

⚠️ Walltime results may be unreliable

Some benchmarks used the Walltime instrument outside CodSpeed Macro Runners, which can make the results inconsistent.

Learn more about Macro Runners

See affected benchmarks

⚠️ 45 benchmarks with a significant change ran on different hardware

Their base and head results were measured on machines with a different CPU, core count or memory, so the changes might not come from the code. Run base and head on the same runner type.

Learn more about Macro Runners

See affected benchmarks

⚡ 45 improved benchmarks
🆕 4 new benchmarks
⏩ 39 skipped benchmarks¹

Performance Changes

	Benchmark	BASE	HEAD	Efficiency
⚡	test_benchmark_lzxpress_huffman_decompress[exact-64k]	371.9 µs	264.4 µs	+40.67%
⚡	test_benchmark_lzxpress_huffman_decompress[long-match]	619.5 µs	444.5 µs	+39.37%
⚡	test_benchmark_lznt1_decompress[basic]	13.3 µs	9.6 µs	+38.8%
⚡	test_benchmark_lzbitmap_decompress[uncompressed]	1.8 µs	1.3 µs	+33.45%
⚡	test_benchmark_lzxpress_huffman_decompress[basic]	285.1 µs	213.8 µs	+33.36%
⚡	test_benchmark_sevenbit_decompress_wide	6.4 µs	4.9 µs	+31.1%
⚡	test_benchmark_lzxpress_huffman_decompress[multi-block]	2 ms	1.6 ms	+31.04%
⚡	test_crc_benchmark[python]	2.1 µs	1.6 µs	+30.43%
⚡	test_benchmark_sevenbit_decompress	5.5 µs	4.2 µs	+30.42%
⚡	test_benchmark_sevenbit_compress	6 µs	4.7 µs	+28.44%
⚡	test_aligned_stream_read_none_size_benchmark	2 µs	1.6 µs	+27.39%
⚡	test_write_sid_benchmark[S-1-5-21-123456789-268435456-500-False]	2.3 µs	1.8 µs	+26.87%
⚡	test_benchmark_lzfse_decompress[large]	1.3 ms	1 ms	+26.38%
⚡	test_benchmark_lzo_decompress[python-header]	1.3 µs	1 µs	+26.16%
⚡	test_write_sid_benchmark[S-1-5-21-123456789-268435456-500-True]	2.5 µs	2 µs	+26.14%
⚡	test_read_sid_benchmark[01040000000000051500000015cd5b0700000010000001f4-]	2.4 µs	1.9 µs	+26.12%
⚡	test_benchmark_adc_decompress[basic]	6.8 µs	5.4 µs	+25.92%
⚡	test_benchmark_lzxpress_decompress[basic]	2.6 µs	2.1 µs	+25.84%
⚡	test_aligned_stream_read_fixed_size_benchmark	2.2 µs	1.7 µs	+25.76%
⚡	test_benchmark_lzo_decompress[python-large]	98 µs	77.9 µs	+25.73%
...	...	...	...	...

ℹ️ Only the first 20 benchmarks are displayed. Go to the app to view all benchmarks.

Tip

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---

_{Comparing lzrc (fc8eb2f) with main (bc05ff3)}

Footnotes

1. 39 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩