Changes between Initial Version and Version 1 of Ticket #13394
- Timestamp:
- 08/24/12 01:57:54 (9 years ago)
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Ticket #13394 – Description
initial v1 1 On ticket #123 23 we found that the use of `WeakValueDictionaries` as caches can cause `removal` callbacks in rather harsh environments. Normal `WeakValueDictionaries` remove keys with dead values by looking up the key. This involves Python equality testing on the key, which can cause any kind of operation in Sage. We need a dictionary where we can delete entries without key comparisons. See below for possible strategies.1 On ticket #12313 we found that the use of `WeakValueDictionaries` as caches can cause `removal` callbacks in rather harsh environments. Normal `WeakValueDictionaries` remove keys with dead values by looking up the key. This involves Python equality testing on the key, which can cause any kind of operation in Sage. We need a dictionary where we can delete entries without key comparisons. See below for possible strategies.
