From 012d6e469db7ea405f1933d020596ff008e778f6 Mon Sep 17 00:00:00 2001
From: "Jorge C. Leitao" <jorgecarleitao@gmail.com>
Date: Thu, 11 Nov 2021 21:30:10 +0000
Subject: [PATCH] Optimized binaryArray.

---
 src/array/binary/mutable.rs | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/src/array/binary/mutable.rs b/src/array/binary/mutable.rs
index ae631ab7fda..51e578945d0 100644
--- a/src/array/binary/mutable.rs
+++ b/src/array/binary/mutable.rs
@@ -136,11 +136,10 @@ impl<O: Offset> MutableBinaryArray<O> {
     }
 
     fn init_validity(&mut self) {
-        self.validity = Some(MutableBitmap::from_trusted_len_iter(
-            std::iter::repeat(true)
-                .take(self.len() - 1)
-                .chain(std::iter::once(false)),
-        ))
+        let mut validity = MutableBitmap::with_capacity(self.offsets.capacity());
+        validity.extend_constant(self.len(), true);
+        validity.set(self.len() - 1, false);
+        self.validity = Some(validity)
     }
 
     /// Converts itself into an [`Array`].