From e66106568cdaa8a6088782d69d8b3267b0474cb8 Mon Sep 17 00:00:00 2001
From: Jorge Leitao <jorgecarleitao@gmail.com>
Date: Fri, 12 Nov 2021 07:06:57 +0100
Subject: [PATCH] Improved performance of is_no_null. (#600)

---
 src/compute/boolean.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/compute/boolean.rs b/src/compute/boolean.rs
index 2977ef03582..bd6b9be8e6d 100644
--- a/src/compute/boolean.rs
+++ b/src/compute/boolean.rs
@@ -124,7 +124,11 @@ pub fn is_null(input: &dyn Array) -> BooleanArray {
 /// ```
 pub fn is_not_null(input: &dyn Array) -> BooleanArray {
     let values = match input.validity() {
-        None => Bitmap::from_trusted_len_iter(std::iter::repeat(true).take(input.len())),
+        None => {
+            let mut mutable = MutableBitmap::new();
+            mutable.extend_constant(input.len(), true);
+            mutable.into()
+        }
         Some(buffer) => buffer.clone(),
     };
     BooleanArray::from_data(DataType::Boolean, values, None)