diff --git a/Cargo.toml b/Cargo.toml
index 506fd3dc3..f0fc59499 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,6 +8,8 @@ opt-level = 3
 
 [profile.release]
 debug = true
+codegen-units = 1
+lto = "thin"
 
 # Make sure that the build scripts and proc-macros are compiled with
 # all the optimizations. It speeds up the zip crate that we use in the build.rs.