ARCore Session提前保存

Question

增强图像的时间太多了 我使用ARCore示例测试项目。 https://github.com/google-ar/sceneform-android-sdk/releases

private boolean setupAugmentedImageDatabase(Config config, Session session) {
    AugmentedImageDatabase augmentedImageDatabase;

    AssetManager assetManager = getContext() != null ? getContext().getAssets() : null;
    if (assetManager == null) {
      Log.e(TAG, "Context is null, cannot intitialize image database.");
      return false;
    }

    // There are two ways to configure an AugmentedImageDatabase:
    // 1. Add Bitmap to DB directly
    // 2. Load a pre-built AugmentedImageDatabase
    // Option 2) has
    // * shorter setup time
    // * doesn't require images to be packaged in apk.
    if (USE_SINGLE_IMAGE) {
      Bitmap augmentedImageBitmap = loadAugmentedImageBitmap(assetManager);
      if (augmentedImageBitmap == null) {
        return false;
      }

      augmentedImageDatabase = new AugmentedImageDatabase(session);
      augmentedImageDatabase.addImage(DEFAULT_IMAGE_NAME, augmentedImageBitmap);
      // If the physical size of the image is known, you can instead use:
      //     augmentedImageDatabase.addImage("image_name", augmentedImageBitmap, widthInMeters);
      // This will improve the initial detection speed. ARCore will still actively estimate the
      // physical size of the image as it is viewed from multiple viewpoints.
    } else {
      // This is an alternative way to initialize an AugmentedImageDatabase instance,
      // load a pre-existing augmented image database.
      try (InputStream is = getContext().getAssets().open(SAMPLE_IMAGE_DATABASE)) {
        augmentedImageDatabase = AugmentedImageDatabase.deserialize(session, is);
      } catch (IOException e) {
        Log.e(TAG, "IO exception loading augmented image database.", e);
        return false;
      }
    }

    config.setAugmentedImageDatabase(augmentedImageDatabase);
    return true;
  }

  private Bitmap loadAugmentedImageBitmap(AssetManager assetManager) {
    try (InputStream is = assetManager.open(DEFAULT_IMAGE_NAME)) {
      return BitmapFactory.decodeStream(is);
    } catch (IOException e) {
      Log.e(TAG, "IO exception loading augmented image bitmap.", e);
    }
    return null;
  } 

在跟踪中，它会找到在图像数据库中设置的图像。

augmentedImageDatabase.addImage(DEFAULT_IMAGE_NAME, augmentedImageBitmap);

但是放置一些图像，例如10张图像，需要很多时间来加载。 我想减少加载时间。 如何减少加载时间？