Mercurial > lbo > hg > leveldb-rs
changeset 404:e58fe2511a3f
merging_iter: Use a fast path if direction doesn't change.
This brings (for iterating) about 7% performance improvement.
| author | Lewin Bormann <lbo@spheniscida.de> |
|---|---|
| date | Wed, 11 Oct 2017 21:10:53 +0200 |
| parents | e06f8508da0c |
| children | 319a27b03734 |
| files | src/merging_iter.rs |
| diffstat | 1 files changed, 4 insertions(+), 0 deletions(-) [+] |
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--- a/src/merging_iter.rs Tue Oct 10 21:50:15 2017 +0200 +++ b/src/merging_iter.rs Wed Oct 11 21:10:53 2017 +0200 @@ -49,6 +49,10 @@ /// call was next() or prev(). This basically sets all iterators to one /// entry after (Forward) or one entry before (Reverse) the current() entry. fn update_direction(&mut self, d: Direction) { + if self.direction == d { + return; + } + let mut keybuf = vec![]; let mut valbuf = vec![];