Dagger 2 performance improvements source code

HeavyExternalLibrary.java

public class HeavyExternalLibrary {

    private boolean initialized = false;

    public HeavyExternalLibrary() {
    }

    public void init() {
        try {
            Thread.sleep(500);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        initialized = true;
    }

    public void callMethod() {
        if (!initialized) throw new RuntimeException("Call init() before you use this library");
    }
}

HeavyLibraryWrapper.java

public class HeavyLibraryWrapper {

    private HeavyExternalLibrary heavyExternalLibrary;

    private boolean isInitialized = false;

    ConnectableObservable<HeavyExternalLibrary> initObservable;

    public HeavyLibraryWrapper() {
        initObservable = Observable.create(new Observable.OnSubscribe<HeavyExternalLibrary>() {
            @Override
            public void call(Subscriber<? super HeavyExternalLibrary> subscriber) {
                HeavyLibraryWrapper.this.heavyExternalLibrary = new HeavyExternalLibrary();
                HeavyLibraryWrapper.this.heavyExternalLibrary.init();
                subscriber.onNext(heavyExternalLibrary);
                subscriber.onCompleted();
            }
        }).subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread()).publish();

        initObservable.subscribe(new SimpleObserver<HeavyExternalLibrary>() {
            @Override
            public void onNext(HeavyExternalLibrary heavyExternalLibrary) {
                isInitialized = true;
            }
        });

        initObservable.connect();
    }

    public void callMethod() {
        if (isInitialized) {
            HeavyExternalLibrary.callMethod();
        } else {
            initObservable.subscribe(new SimpleObserver<HeavyExternalLibrary>() {
                @Override
                public void onNext(HeavyExternalLibrary heavyExternalLibrary) {
                    heavyExternalLibrary.callMethod();
                }
            });
        }
    }
}

Measurement.java

@Override
protected void setupActivityComponent() {
    Debug.startMethodTracing("SplashTrace");
    GithubClientApplication.get(this)
            .getAppComponent()
            .plus(new SplashActivityModule(this))
            .inject(this);
    Debug.stopMethodTracing();
}

ProvideHeavyExternalLibrary.java

//AppModule

@Provides
@Singleton
HeavyExternalLibrary provideHeavyExternalLibrary() {
    HeavyExternalLibrary heavyExternalLibrary = new HeavyExternalLibrary();
    heavyExternalLibrary.init();
    return heavyExternalLibrary;
}

SplashActivityModule.java

//SplashActivityModule

@Provides
@ActivityScope
SplashActivityPresenter
provideSplashActivityPresenter(Validator validator, UserManager userManager, HeavyExternalLibrary heavyExternalLibrary) {
    return new SplashActivityPresenter(splashActivity, validator, userManager, heavyExternalLibrary);
}