singleflight: add OnceGroup #97
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OnceGroup.Do has the same semantics as Group.Do, but caches and returns the first computed result if called sequentially. Fixes golang#96.
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Not really a fan of its name, nor expanding the API. I kinda consider this package done, working, and frozen. Can't your fill function do its own caching if that's desired? |
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OnceGroup.Do has the same semantics as Group.Do, but caches and
returns the first computed result if called sequentially.