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Memoize a syscall-intensive function #897

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Memoize a syscall-intensive function #897

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2 changes: 2 additions & 0 deletions coverage/files.py
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@

import hashlib
import fnmatch
import functools
import ntpath
import os
import os.path
Expand Down Expand Up @@ -158,6 +159,7 @@ def unicode_filename(filename):
return filename


@functools.lru_cache(None)
@contract(returns='unicode')
def abs_file(path):
"""Return the absolute normalized form of `path`."""
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