yahoo/storage-lru — pull request #11 by lingyan (2014-12-23 02:45:09+00:00)
Title: perf optimization, no longer initializing meta in constructor; construct...

@dmhood

* no longer initializing meta in constructor, since scanning records to build meta is only needed when we need to purge
* constructor is back to synchronous
* use async.mapSeries to guarantee purge order
* eliminates recursive call to purge()
* remove scanSize option. just use purgeLoadIncrase, for API simplicity