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DNM: persistent kernel #268
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Signed-off-by: Alex Chi <iskyzh@gmail.com>
Signed-off-by: Alex Chi <iskyzh@gmail.com>
Signed-off-by: Alex Chi <iskyzh@gmail.com>
Signed-off-by: Alex Chi <iskyzh@gmail.com>
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The patch adds a new ng-kernel crate which contains a very simple implementation of memo table based on persistent storage (i.e., database). No in-memory state is needed and all reads/writes are done on sqlite. See persistent_memo.rs for more info. The database only stores the minimum required information of the memo table, and can be extended to build indexes or other relations to ensure retrieving info from the backend is efficient (i.e., implementing fingerprint lazy merge optimizations on skyzh/lazy-merge branch, though that one is not 100% correct)