GH-126363: Speed up pattern parsing in pathlib.Path.glob()
#126364
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The implementation of `Path.glob()` does rather a hacky thing: it calls `self.with_segments()` to convert the given pattern to a `Path` object, and then peeks at the private `_raw_path` attribute to see if pathlib removed a trailing slash from the pattern. In this patch, we make `glob()` use a new `_parse_pattern()` classmethod that splits the pattern into parts while preserving information about any trailing slash. This skips the cost of creating a `Path` object, and avoids some path anchor normalization, which makes `Path.glob()` slightly faster. But mostly it's about making the code less naughty.
tomasr8
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Nov 3, 2024
Co-authored-by: Tomas R. <[email protected]>
picnixz
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Dec 8, 2024
…ython#126364) The implementation of `Path.glob()` does rather a hacky thing: it calls `self.with_segments()` to convert the given pattern to a `Path` object, and then peeks at the private `_raw_path` attribute to see if pathlib removed a trailing slash from the pattern. In this patch, we make `glob()` use a new `_parse_pattern()` classmethod that splits the pattern into parts while preserving information about any trailing slash. This skips the cost of creating a `Path` object, and avoids some path anchor normalization, which makes `Path.glob()` slightly faster. But mostly it's about making the code less naughty. Co-authored-by: Tomas R. <[email protected]>
ebonnal
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Jan 12, 2025
…ython#126364) The implementation of `Path.glob()` does rather a hacky thing: it calls `self.with_segments()` to convert the given pattern to a `Path` object, and then peeks at the private `_raw_path` attribute to see if pathlib removed a trailing slash from the pattern. In this patch, we make `glob()` use a new `_parse_pattern()` classmethod that splits the pattern into parts while preserving information about any trailing slash. This skips the cost of creating a `Path` object, and avoids some path anchor normalization, which makes `Path.glob()` slightly faster. But mostly it's about making the code less naughty. Co-authored-by: Tomas R. <[email protected]>
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The implementation of
Path.glob()does rather a hacky thing: it callsself.with_segments()to convert the given pattern to aPathobject, and then peeks at the private_raw_pathattribute to see if pathlib removed a trailing slash from the pattern.In this patch, we make
glob()use a new_parse_pattern()classmethod that splits the pattern into parts while preserving information about any trailing slash. This skips the cost of creating aPathobject, and avoids some path anchor normalization, which makesPath.glob()slightly faster. But mostly it's about making the code less naughty.This makes a no-match glob ~50% faster:
pathlib.Path.glob()#126363