LTO

.github/workflows/linux_cli.yml

@@ -24,6 +24,10 @@ jobs:
       - name: Setup rust version
         run: rustup default ${{ matrix.toolchain }}
 
+      - name: Enable LTO
+        run: sed -i 's/#lto = "fat"/lto = "fat"/g' Cargo.toml
+        if: ${{ matrix.toolchain == 'release' }}
+
       - name: Build Release
         run: cargo build --release --bin czkawka_cli
         if: ${{ (matrix.type == 'release') }}

.github/workflows/linux_cli_eyra.yml

@@ -32,6 +32,10 @@ jobs:
           echo 'fn main() { println!("cargo:rustc-link-arg=-nostartfiles"); }' > build.rs
           cd ..
 
+      - name: Enable LTO
+        run: sed -i 's/#lto = "fat"/lto = "fat"/g' Cargo.toml
+        if: ${{ matrix.toolchain == 'release' }}
+
       - name: Build Release
         run: cargo build --release --bin czkawka_cli
         if: ${{ (matrix.type == 'release') }}

.github/workflows/linux_gui.yml

@@ -21,6 +21,10 @@ jobs:
       - name: Setup rust version
         run: rustup default ${{ matrix.toolchain }}
 
+      - name: Enable LTO
+        run: sed -i 's/#lto = "fat"/lto = "fat"/g' Cargo.toml
+        if: ${{ matrix.toolchain == 'release' }}
+
       - name: Build Release Krokiet
         run: cargo build --release --bin krokiet
         if: ${{ (matrix.type == 'release') }}
@@ -47,6 +51,10 @@ jobs:
       - name: Setup rust version
         run: rustup default ${{ matrix.toolchain }}
 
+      - name: Enable LTO
+        run: sed -i 's/#lto = "fat"/lto = "fat"/g' Cargo.toml
+        if: ${{ matrix.toolchain == 'release' }}
+
       - name: Build Release Krokiet heif
         run: cargo build --release --bin krokiet --features "heif,libraw"
         if: ${{ (matrix.type == 'release') }}
@@ -73,6 +81,10 @@ jobs:
       - name: Setup rust version
         run: rustup default ${{ matrix.toolchain }}
 
+      - name: Enable LTO
+        run: sed -i 's/#lto = "fat"/lto = "fat"/g' Cargo.toml
+        if: ${{ matrix.toolchain == 'release' }}
+
       - name: Build Release Heif Libraw
         run: cargo build --release --bin czkawka_gui --features "heif,libraw"
         if: ${{ (matrix.type == 'release') }}
@@ -111,6 +123,10 @@ jobs:
       - name: Setup rust version
         run: rustup default ${{ matrix.toolchain }}
 
+      - name: Enable LTO
+        run: sed -i 's/#lto = "fat"/lto = "fat"/g' Cargo.toml
+        if: ${{ matrix.toolchain == 'release' }}
+
       - name: Build Release
         run: cargo build --release --bin czkawka_gui
 

.github/workflows/mac.yml

@@ -30,6 +30,10 @@ jobs:
       - name: Setup rust version
         run: rustup default ${{ matrix.toolchain }}
 
+      - name: Enable LTO
+        run: sed -i 's/#lto = "fat"/lto = "fat"/g' Cargo.toml
+        if: ${{ matrix.toolchain == 'release' }}
+
       - name: Build Release
         run: cargo build --release
         if: ${{ matrix.type == 'release'}}

.github/workflows/windows.yml

@@ -30,6 +30,9 @@ jobs:
         run: |
           rustup target add x86_64-pc-windows-gnu
 
+      - name: Enable LTO
+        run: sed -i 's/#lto = "fat"/lto = "fat"/g' Cargo.toml
+
       - name: Compile Krokiet
         run: cargo build --release --target x86_64-pc-windows-gnu --bin krokiet
 
@@ -75,6 +78,9 @@ jobs:
       - name: Setup rust version
         run: rustup default stable-x86_64-pc-windows-gnu
 
+      - name: Enable LTO
+        run: sed -i 's/#lto = "fat"/lto = "fat"/g' Cargo.toml
+
       - name: Compile Krokiet
         run: cargo build --release --bin krokiet
 

Cargo.toml

@@ -18,6 +18,7 @@ resolver = "2"
 panic = "unwind"
 
 # LTO setting is disabled by default, because release mode is usually needed to develop app and compilation with LTO would take a lot of time
+# But it is used to optimize release builds(and probably also in CI, where time is not so important as in local development)
 #lto = "fat"
 
 # Optimize all dependencies except application/workspaces, even in debug builds

Changelog.md

@@ -33,6 +33,7 @@
 - Decrease a little size of cache by few percents and improve loading/saving speed - [#1159](https://github.com/qarmin/czkawka/pull/1159)
 - Added ability to remove from scan files with excluded extensions - [#1184](https://github.com/qarmin/czkawka/pull/1102)
 - Fixed not showing in similar images results, files with same hashes when using reference folders - [#1184](https://github.com/qarmin/czkawka/pull/1102)
+- Optimize release binaries with LTO - [#1184](https://github.com/qarmin/czkawka/pull/1102)
 
 ## Version 6.1.0 - 15.10.2023r
 - BREAKING CHANGE - Changed cache saving method, deduplicated, optimized and simplified procedure(all files needs to be hashed again) - [#1072](https://github.com/qarmin/czkawka/pull/1072), [#1086](https://github.com/qarmin/czkawka/pull/1086)