Write-through support for memory-mapping #81
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The input file wasn't even being memory-mapped!
Documentation and tests have also been added.
- Drop official support for Python 3.8. - Drop official support for NumPy < 1.21.
nh2
reviewed
Mar 25, 2025
| >>> isinstance(plydata['vertex'].data, numpy.memmap) | ||
| True | ||
| >>> plydata['vertex']['x'] = 100 | ||
| >>> plydata['vertex'].data.flush() |
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@dranjan: Thank you!
I should also share this info:
To make Linux release the memory of an mmaped plyfile so that RES ram usage goes down, I have to:
import mmap
# Once, after opening:
for element in plydata.elements:
element.data._mmap.madvise(mmap.MADV_SEQUENTIAL) # if we're doing sequential writes
# After writing enough:
plydata['vertex'].data.flush()
plydata['vertex'].data._mmap.madvise(mmap.MADV_DONTNEED)
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Closes #79.
Resolves #80.
📚 Documentation preview 📚: https://python-plyfile--81.org.readthedocs.build/en/81/