chore: optimize CI workflow and Gradle build performance

Author: taciturnaxolotl

.github/workflows/ci.yml

@@ -12,26 +12,35 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
+      with:
+        fetch-depth: 1  # Shallow clone for faster checkout
 
     - name: Set up JDK 17
       uses: actions/setup-java@v4
       with:
         java-version: '17'
         distribution: 'temurin'
+        cache: 'gradle'
 
-    - name: Setup Node.js
-      uses: actions/setup-node@v4
+    - name: Cache Gradle packages
+      uses: actions/cache@v3
       with:
-        node-version: '20'
-    
-    - name: Install dependencies
-      run: npm install
-    
-    - name: Check Java formatting
-      run: ./gradlew checkJavaFormat
+        path: |
+          ~/.gradle/caches
+          ~/.gradle/wrapper
+        key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
+        restore-keys: |
+          ${{ runner.os }}-gradle-
     
-    - name: Compile code
-      run: ./gradlew compileJava
+    - name: Check Java formatting and compile (parallel)
+      run: ./gradlew checkJavaFormat compileJava --parallel --max-workers=4
 
     - name: Run tests
-      run: ./gradlew test
+      run: ./gradlew test --parallel --max-workers=4
+      
+    - name: Cleanup Gradle Cache
+      # Remove some files from the Gradle cache, so they aren't cached by GitHub Actions.
+      # Restoring these files from a GitHub Actions cache might cause problems for future builds.
+      run: |
+        rm -f ~/.gradle/caches/modules-2/modules-2.lock
+        rm -f ~/.gradle/caches/modules-2/gc.properties

gradle.properties

@@ -0,0 +1,8 @@
+# Gradle performance improvements
+org.gradle.jvmargs=-Xmx2g -XX:MaxMetaspaceSize=512m -XX:+HeapDumpOnOutOfMemoryError
+org.gradle.parallel=true
+org.gradle.caching=true
+org.gradle.configureondemand=true
+
+# Avoid warning about deprecated Gradle features
+org.gradle.warning.mode=none