From cc51340dc539c664ce2e37e12b19a833786a173b Mon Sep 17 00:00:00 2001
From: Volker Mische <volker.mische@gmail.com>
Date: Fri, 11 Mar 2022 17:37:47 +0100
Subject: [PATCH] fix: less allocations

Co-authored-by: str4d <thestr4d@gmail.com>
---
 src/fields.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/fields.rs b/src/fields.rs
index 70ce865..9e01217 100644
--- a/src/fields.rs
+++ b/src/fields.rs
@@ -11,6 +11,6 @@ pub use fq::*;
 fn u64_to_u32(limbs: &[u64]) -> alloc::vec::Vec<u32> {
     limbs
         .iter()
-        .flat_map(|limb| alloc::vec![(limb & 0xFFFF_FFFF) as u32, (limb >> 32) as u32])
+        .flat_map(|limb| Some((limb & 0xFFFF_FFFF) as u32).into_iter().chain(Some((limb >> 32) as u32)))
         .collect()
 }