Improve fetching cache from chained backend #20
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refs #19 While profiling a production server noticed during a tracking request which takes like 50ms we spent 2.73 ms in `doContains` and 2ms in `doFetch`. Considering this is like 4% of the time spent of a tracking request in `doContains()` even though it's not needed. The other backends will silently fail anyway and return false when a cache is not contained in a backend. And sometimes they do the `doContains` in `doFetch` anyway (eg ArrayCache). FYI @mattab
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refs #19
While profiling a production server noticed during a tracking request which takes like 50ms we spent 2.73 ms in
doContainsand 2ms indoFetch. Considering this is like 4% of the time spent of a tracking request indoContains()even though it's not needed. The other backends will silently fail anyway and return false when a cache is not contained in a backend. And sometimes they do thedoContainsindoFetchanyway (eg ArrayCache).FYI @mattab