c1f255af96
Target: <10MB APK for arm64-v8a Rust optimizations (Cargo.toml): - opt-level = 'z' (size over speed) - LTO enabled (dead code elimination) - panic = 'abort' (no unwinding) - strip = true (remove symbols) - Minimal tokio/serde features Android optimizations (build.gradle.kts): - Split APKs by ABI (users get only their arch) - Remove material-icons-extended (-5MB) - Remove unused serialization (-300KB) - Remove debug symbols in release ProGuard (proguard-rules.pro): - Strip Log.v/d/i in release - Remove Kotlin null checks - Aggressive repackaging - 5 optimization passes Added SIZE.md with optimization strategy. Expected sizes: - Native lib: <3MB per ABI - APK (arm64): <10MB - APK (universal): <20MB
2.4 KiB
2.4 KiB
ZeroClaw Android - Binary Size Optimization
Target Sizes
| Component | Target | Notes |
|---|---|---|
| Native lib (per ABI) | <3MB | Rust, optimized for size |
| APK (arm64-v8a) | <10MB | Single ABI, most users |
| APK (universal) | <20MB | All ABIs, fallback |
Optimization Strategy
1. Rust Native Library
[profile.release]
opt-level = "z" # Optimize for size
lto = true # Link-time optimization
codegen-units = 1 # Better optimization
panic = "abort" # No unwinding overhead
strip = true # Remove symbols
Expected savings: ~40% reduction vs default release
2. Android APK
Enabled:
- R8 minification (
isMinifyEnabled = true) - Resource shrinking (
isShrinkResources = true) - ABI splits (users download only their arch)
- Aggressive ProGuard rules
Removed:
material-icons-extended(~5MB → 0MB)kotlinx-serialization(~300KB, unused)ui-tooling-preview(~100KB, debug only)- Debug symbols in release
3. Dependencies Audit
| Dependency | Size | Keep? |
|---|---|---|
| Compose BOM | ~3MB | ✅ Required |
| Material3 | ~1MB | ✅ Required |
| material-icons-extended | ~5MB | ❌ Removed |
| Navigation | ~200KB | ✅ Required |
| DataStore | ~100KB | ✅ Required |
| WorkManager | ~300KB | ✅ Required |
| Security-crypto | ~100KB | ✅ Required |
| Coroutines | ~200KB | ✅ Required |
| Serialization | ~300KB | ❌ Removed (unused) |
4. Split APKs
splits {
abi {
isEnable = true
include("arm64-v8a", "armeabi-v7a", "x86_64")
isUniversalApk = true
}
}
Result:
app-arm64-v8a-release.apk→ ~10MB (90% of users)app-armeabi-v7a-release.apk→ ~9MB (older devices)app-x86_64-release.apk→ ~10MB (emulators)app-universal-release.apk→ ~18MB (fallback)
Measuring Size
# Build release APK
./gradlew assembleRelease
# Check sizes
ls -lh app/build/outputs/apk/release/
# Analyze APK contents
$ANDROID_HOME/build-tools/34.0.0/apkanalyzer apk summary app-release.apk
Future Optimizations
- Baseline Profiles - Pre-compile hot paths
- R8 full mode - More aggressive shrinking
- Custom Compose compiler - Smaller runtime
- WebP images - Smaller than PNG
- Dynamic delivery - On-demand features
Philosophy
"Zero overhead. Zero compromise."
Every KB matters. We ship what users need, nothing more.