diff --git a/Cargo.toml b/Cargo.toml
index b1bd3edc84..23414c705f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -55,6 +55,7 @@ toml = { version = "0.7.2" }
 
 [profile.release]
 lto = "fat"
+codegen-units = 1
 
 [profile.dev.package.insta]
 opt-level = 3