gh-120754: Update estimated_size in C truncate by cmaloney · Pull Request #121357 · python/cpython

Sometimes a large file is truncated (test_largefile). While
estimated_size is used as a estimate (the read will stil get the number
of bytes in the file), that it is much larger than the actual size of
data can result in a significant over allocation and sometimes lead to
a MemoryError / running out of memory.

This brings the C implementation to match the Python _pyio
implementation.

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cmaloney changed the title gh-120754: Update size_estimated in C truncate gh-120754: Update estimated_size in C truncate

cmaloney deleted the cmaloney/fix_largefile_amd64 branch

noahbkim pushed a commit to hudson-trading/cpython that referenced this pull request

Sometimes a large file is truncated (test_largefile). While
estimated_size is used as a estimate (the read will stil get the number
of bytes in the file), that it is much larger than the actual size of
data can result in a significant over allocation and sometimes lead to
a MemoryError / running out of memory.

This brings the C implementation to match the Python _pyio
implementation.

estyxx pushed a commit to estyxx/cpython that referenced this pull request

Sometimes a large file is truncated (test_largefile). While
estimated_size is used as a estimate (the read will stil get the number
of bytes in the file), that it is much larger than the actual size of
data can result in a significant over allocation and sometimes lead to
a MemoryError / running out of memory.

This brings the C implementation to match the Python _pyio
implementation.