[GitHub] nickva commented on issue #831: Filter _changes by key to speed up replication

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nickva commented on issue #831: Filter _changes by key to speed up replication
URL: https://github.com/apache/couchdb/issues/831#issuecomment-361359518
 
 
   That's true. Currently the Mango selector passed to the changes feed doesn't use any Mango indices. It is a pure filter passed in with the request body. Could think of it for example, as a more optimized js filter function which doesn't live in a source _design document and doesn't need to do the extra work of going to/from external javascript engine process.

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