BREP : Binary Search in plaintext and gzip files

Related tags

File & Path Utilities python gzip grep
Overview

BREP : Binary Search in plaintext and gzip files

Search large files in O(log n) time using binary search.
We support plaintext and Gzipped files.

Benchmark : 8x faster than grep on a 2GB dataset !

brep is usually faster than grep for >1GB datasets.

Check tests/benchmark.py to reproduce the results.

grep ^777 test.txt : 1.594 s (15 runs)
brep 777 test.txt : 206.8 ms (15 runs)

Installation

pip install brep or pip install . from this repo

Index your file

In order to conduct binary search, your file needs to be sorted.
We recommend GNU sort, as it's multithreaded and supports large files.
LC_ALL=C sort -u -o output_file input_file

BREP supports compressed file in the GZIP format.
We recommend pigz for quick multicore compression : pigz file

Usage

Provide 1 prefix search term and 1 filepath
brep 77777 test/large.gz

You can also search from our Python class

from brep import Search

for result in Search("77777", "test/large.gz"):
    print(result)

Contribute

PRs are welcome!

Install dev dependencies: pip install -e .[dev]
Test and lint before submitting: pytest && flake8

Todo

  • Reimplement in Rust
  • Faster gz size estimation
  • Search multiple strings at once
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