charex

String Array Extensions for Numba

Enhance Numba with NumPy's string processing features by importing charex:

import charex

Comparison operations:

https://numpy.org/doc/stable/reference/routines.char.html#comparison

• char.equal
• char.not_equal
• char.greater_equal
• char.less_equal
• char.greater
• char.less
• char.compare_chararrays

Occurrence and Property information:

https://numpy.org/doc/stable/reference/routines.char.html#string-information

• char.count
• char.endswith
• char.startswith
• char.find
• char.rfind
• char.index
• char.rindex
• char.str_len
• char.isalpha
• char.isalnum
• char.isspace
• char.isdecimal
• char.isdigit
• char.isnumeric
• char.istitle
• char.isupper
• char.islower

Includes support for UTF-32 strings and ASCII bytes on contiguous arrays of 1-dimension and scalars.

Benchmarks

Despite a minor initial overhead from Numba's LLVM initialization, charex offsets this with increased data scale, outperforming NumPy in handling occurrence and property information.

Comparison Operators

Occurrence Information

Property Information

The benchmarks are generated during testing using charex/tests/test_comparison.py and charex/tests/test_string_information.py.

Last tested 2024-02-23: Numba 0.59.0, NumPy 1.26.3