chore: tweak release config (#1307)

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## Changes

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Cargo.toml

@@ -297,3 +297,10 @@ lto = "off"
 # https://endler.dev/2020/rust-compile-times/#avoid-procedural-macro-crates
 [profile.dev.build-override]
 opt-level = 3
+
+[profile.release]
+debug = false
+lto = "fat"
+codegen-units = 1
+opt-level = 3
+