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An unexpected perf feature
LWN.net Weekly Edition for May 16, 2013
A look at the PyPy 2.0 release
PostgreSQL 9.3 beta: Federated databases and more
LWN.net Weekly Edition for May 9, 2013
COW is slower if the copy actually needs to take place, but faster if the copy is never needed.
The question is how likely are you to need to do the copy.
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