Published at LXer:

A revised patch-set was published a few days ago that can make meta-data operations for the Btrfs file-system approximately 20% faster. The latest patches build upon what I wrote about in February with A Patch That Can Make Btrfs 5~10% Faster. The idea comes down to providing an extent buffer cache for each i-node so that the item doesn't need to be searched from the root of a B+ tree everytime, thereby making searches quicker. The earlier patch wasn't merged but now it's up to a second version consisting of three patches and a stated 20% performance improvement for meta-data operations.

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