Add benchmarks (#93)

Author: fintelia

.github/workflows/rust.yml

@@ -36,6 +36,9 @@ jobs:
     - name: test
       if: ${{ matrix.rust != '1.67.1' }}
       run: cargo test -v && cargo doc -v
+    - name: bench
+      if: ${{ matrix.rust == 'nightly' }}
+      run: cargo bench -v --features _benchmarks
 
   test_big_endian:
     # github actions does not support big endian systems directly, but it does support QEMU.
@@ -67,23 +70,11 @@ jobs:
   clippy:
     runs-on: ubuntu-latest
     steps:
-    - name: install-dependencies
-      run: sudo apt update && sudo apt install ninja-build meson nasm
     - uses: actions/checkout@v4
     - uses: dtolnay/rust-toolchain@stable
       with:
         components: clippy
     - run: cargo clippy --all-features -- -D warnings
-      env:
-        SYSTEM_DEPS_DAV1D_BUILD_INTERNAL: always
-
-  build_benchmarks:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v4
-    - uses: dtolnay/rust-toolchain@nightly
-    - name: build
-      run: cargo build -v --benches
 
   rustfmt:
     runs-on: ubuntu-latest

Cargo.toml

@@ -21,3 +21,6 @@ paste = "1.0.14"
 png = "0.17.12"
 rand = "0.8.5"
 webp = "0.3.0"
+
+[features]
+_benchmarks = []

src/lib.rs

@@ -4,6 +4,10 @@
 #![deny(missing_docs)]
 // Increase recursion limit for the `quick_error!` macro.
 #![recursion_limit = "256"]
+// Enable nightly benchmark functionality if "_benchmarks" feature is enabled.
+#![cfg_attr(all(test, feature = "_benchmarks"), feature(test))]
+#[cfg(all(test, feature = "_benchmarks"))]
+extern crate test;
 
 pub use self::decoder::{DecodingError, LoopCount, WebPDecoder};
 pub use self::encoder::{ColorType, EncodingError, WebPEncoder};