New submission from Zhigang Wang <w1z...@gmail.com>:
shelf without writeback=True is too slow, while shelves with
writeback=True takes too much time to close. And even worse, these codes
can not run:
$ cat test_shelve.py
#!/usr/bin/env python
import shelve
store = shelve.open("/tmp/shelve.db", writeback=True)
class Test(object):
pass
def main():
store["a"] = Test()
if __name__ == '__main__':
main()
$ python test_shelve.py
Exception cPickle.PicklingError: "Can't pickle <class '__main__.Test'>:
it's not the same object as __main__.Test" in ignored
With this module, we can make it to run.
I think it's worth add this function to shelve. We can achieve great
improvement with some avoidable limitations.
The other approach to add this function is to add a extra option the
shelve.open(). We can discuss for which is better.
----------
components: Library (Lib)
files: fast_shelf.patch
keywords: patch
messages: 83516
nosy: zhigang
severity: normal
status: open
title: [PATCH]Add FastDbfilenameShelf: shelf nerver sync cache even when
writeback=True
type: feature request
versions: Python 3.1
Added file: http://bugs.python.org/file13317/fast_shelf.patch
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue5483>
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