From 8e1084eec33ae3e5c0b7e5640ffc65d6dd91a427 Mon Sep 17 00:00:00 2001
From: Oliver Gould <ver@buoyant.io>
Date: Fri, 27 Aug 2021 09:48:01 -0700
Subject: [PATCH] Enable link-time optimizations (#1227)

This change enables LTO for release builds, which reduces CPU and
memory usage in load tests.

This increases compile-time overhead, so we also update rust-toolchain
to 1.55.0 beta7 (due out 2021/9/9), which substantially reduces compile-
time overhead.
---
 Cargo.toml     | 4 ++++
 rust-toolchain | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/Cargo.toml b/Cargo.toml
index 22071bacad..28f38c61a7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -66,8 +66,12 @@ members = [
 # disable them.
 [profile.dev]
 debug = false
+
 [profile.test]
 debug = false
 
+[profile.release]
+lto = true
+
 [patch.crates-io]
 webpki = { git = "https://github.com/linkerd/webpki", branch = "cert-dns-names-0.21" }
diff --git a/rust-toolchain b/rust-toolchain
index b7921ae87b..c3c8cf5621 100644
--- a/rust-toolchain
+++ b/rust-toolchain
@@ -1 +1 @@
-1.54.0
+beta-2021-08-22