Compress binary with upx. (#5140)

* Compress binary with upx.

* Changing opt-level from z to 3

* Changing lto from thin to fat for release.

Cargo.toml

@@ -26,9 +26,10 @@ workspace = true
 
 [profile.release]
 debug = 0
-lto = "thin"
-strip = true    # Automatically strip symbols from the binary.
-opt-level = "z" # Optimize for size.
+lto = "fat"
+strip = true      # Automatically strip symbols from the binary.
+opt-level = 3     # Optimize for speed, not size.
+codegen-units = 1 # Reduce parallel code generation.
 
 # This profile significantly speeds up build time. If debug info is needed you can comment the line
 # out temporarily, but make sure to leave this in the main branch.

docker/Dockerfile

@@ -38,6 +38,12 @@ RUN --mount=type=cache,target=/lemmy/target set -ex; \
         cargo clean --release; \
         cargo build --features "${CARGO_BUILD_FEATURES}" --release; \
         mv target/"${RUST_RELEASE_MODE}"/lemmy_server ./lemmy_server; \
+        #
+        # Compress the binary with upx
+        wget https://github.com/upx/upx/releases/download/v4.2.4/upx-4.2.4-amd64_linux.tar.xz; \
+        tar -xvf upx-4.2.4-amd64_linux.tar.xz; \
+        cp upx-4.2.4-amd64_linux/upx /usr/bin; \
+        upx --best --lzma lemmy_server; \
     fi
 
 # ARM64 builder
@@ -71,9 +77,14 @@ RUN --mount=type=cache,target=./target,uid=10001,gid=10001 set -ex; \
         cargo clean --release; \
         cargo build --features "${CARGO_BUILD_FEATURES}" --release; \
         mv "./target/$CARGO_BUILD_TARGET/$RUST_RELEASE_MODE/lemmy_server" /home/lemmy/lemmy_server; \
+        #
+        # Compress the binary with upx
+        wget https://github.com/upx/upx/releases/download/v4.2.4/upx-4.2.4-arm64_linux.tar.xz; \
+        tar -xvf upx-4.2.4-arm64_linux.tar.xz; \
+        cp upx-4.2.4-arm64_linux/upx /usr/bin; \
+        upx --best --lzma /home/lemmy/lemmy_server; \
     fi
 
-
 # amd64 base runner
 FROM ${AMD_RUNNER_IMAGE} AS runner-linux-amd64