Add benchmark jobs to Github Actions

.github/workflows/build.yml

@@ -41,3 +41,55 @@ jobs:
         sudo apt update
         sudo apt install --no-install-recommends scdoc
         for file in $(find . -type f -iwholename "./docs/*.scd"); do scdoc < $file > /dev/null; done
+
+  benchmark:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+
+    - name: Install dependencies
+      run: |
+        # install sway and flamegraph dependencies
+        sudo apt update
+        sudo apt install --no-install-recommends -y sway \
+             linux-tools-common linux-tools-generic linux-tools-`uname -r`
+        # install flamegraph-rs
+        cargo install flamegraph
+        # install hyperfine
+        wget https://github.com/sharkdp/hyperfine/releases/download/v1.16.1/hyperfine_1.16.1_amd64.deb
+        sudo dpkg -i hyperfine_1.16.1_amd64.deb
+
+    - name: Run benchmarks
+      run: |
+        export XDG_RUNTIME_DIR=/tmp
+        export WLR_BACKENDS=headless
+        export WLR_LIBINPUT_NODEVICES=1
+        export WLR_RENDERER_ALLOW_SOFTWARE=1
+        export SWAYSOCK=/tmp/swaysock
+
+        # file where we'll store $WAYLAND_DISPLAY
+        export SWAY_STARTUP=/tmp/sway_startup
+
+        sway -c ./test/swayconfig -d &
+        export SWAY_PID=$!
+        # TODO: maybe find a more elegant way to wait for sway to start
+        sleep 10
+
+        # load WAYLAND_DISPLAY from the file we stored it in, as defined
+        # in the test sway config
+        read wayland_display < "$SWAY_STARTUP"
+        export WAYLAND_DISPLAY="$wayland_display"
+        sudo sh -c 'echo -1 >/proc/sys/kernel/perf_event_paranoid'
+        cargo flamegraph --release -- --log-level debug - > /dev/null
+        hyperfine --export-json hyperfine.json "cargo run --release -- --log-level debug - > /dev/null"
+
+    - name: Collect benchmark results
+      uses: actions/upload-artifact@v4
+      with:
+        name: benchmark-results
+        path: |
+          flamegraph.svg
+          perf.data
+          hyperfine.json

test/swayconfig

@@ -0,0 +1,27 @@
+# Create a virtual, headless output for wayshot to capture
+output HEADLESS-1 {
+pos 1920,0
+mode 1280x720@75Hz
+}
+
+### Store the $WAYLAND_DISPLAY variable in a file
+exec echo "$WAYLAND_DISPLAY" > "$SWAY_STARTUP"
+
+# Status Bar:
+#
+# Read `man 5 sway-bar` for more information about this section.
+bar {
+    position top
+
+    # When the status_command prints a new line to stdout, swaybar updates.
+    # The default just shows the current date and time.
+    status_command while date +'%Y-%m-%d %I:%M:%S %p'; do sleep 1; done
+
+    colors {
+        statusline #ffffff
+        background #323232
+        inactive_workspace #32323200 #32323200 #5c5c5c
+    }
+}
+
+include /etc/sway/config.d/*