From 237bab06d6bd315299abc93f3a445333e34f4c40 Mon Sep 17 00:00:00 2001 From: Christian Lachner Date: Thu, 23 Nov 2023 10:29:01 +0100 Subject: [PATCH] Add additional build target which optimizes for size OpenWRT is a project which builds and distributes firmware for embedded devies like routers, access points, and so on. These devices are usually very limited in terms of storage. Therefore, optimizing binaries for size at the cost of execution speed is usually desired. This PR adds an additional build-target, namely "release-micro", which implements several parameters which optimize in favor of binary size. The following parameters were chosen: - opt-level "z": Optimize for size with disabled loop vectorization - strip "symbols": Strip debuginfo and symbols from binary - lto "fat": Enable link-time optimizations across all crates - codegen-units 1: Disable parallelization of code generation to allow for additional optimizations - panic "abort": Abort on Panic() instead of unwinding All these build parameters significantly reduce the binary size from >40MB to <15MB - the actual amount depends on the target architecture. We would like to upstream this new build target to keep our build environment simple. Other projects which deploy vaultwarden on size-constrained environments may benefit from this change too. Signed-off-by: Christian Lachner --- Cargo.toml | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/Cargo.toml b/Cargo.toml index e720219c813..b37dbe22c09 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -181,3 +181,12 @@ split-debuginfo = "unpacked" # This is a huge speed improvement during testing [profile.dev.package.argon2] opt-level = 3 + +# Optimize for size +[profile.release-micro] +inherits = "release" +opt-level = "z" +strip = "symbols" +lto = "fat" +codegen-units = 1 +panic = "abort"