From 816db7a0aa6c45d6695f7c2ab9bb6bed28a2ebc4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cl=C3=A9ment=20Renault?= <clement@meilisearch.com>
Date: Sat, 29 Aug 2020 11:21:30 +0200
Subject: [PATCH] Improve the RoaringBitmap codec to reserve enough vector
 space

---
 src/heed_codec/roaring_bitmap_codec.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/heed_codec/roaring_bitmap_codec.rs b/src/heed_codec/roaring_bitmap_codec.rs
index abc89e90d..755296704 100644
--- a/src/heed_codec/roaring_bitmap_codec.rs
+++ b/src/heed_codec/roaring_bitmap_codec.rs
@@ -15,7 +15,7 @@ impl heed::BytesEncode<'_> for RoaringBitmapCodec {
     type EItem = RoaringBitmap;
 
     fn bytes_encode(item: &Self::EItem) -> Option<Cow<[u8]>> {
-        let mut bytes = Vec::new();
+        let mut bytes = Vec::with_capacity(item.serialized_size());
         item.serialize_into(&mut bytes).ok()?;
         Some(Cow::Owned(bytes))
     }