Images from Firebase load slow in Ionic Framework

Images are rendering extremely slow in my Ionic app when uploading or downloading from Firebase. Is there an easy solution for this?

  selectPhoto(photoName: string): void {
    this.camera.getPicture({
      sourceType: this.camera.PictureSourceType.PHOTOLIBRARY,
      destinationType: this.camera.DestinationType.DATA_URL,
      quality: 100,
      encodingType: this.camera.EncodingType.PNG,
    }).then(imageData => {
      this.myPhoto = imageData;
      this.uploadPhoto(photoName);
    }, error => {
      console.log("ERROR -> " + JSON.stringify(error));
    });
  }
 
  private uploadPhoto(photoName: string): void {
    this.myPhotosRef.child(photoName)
      .putString(this.myPhoto, 'base64', { contentType: 'image/png' })
      .then((savedPicture) => {
        this.myPhotoURL = savedPicture.downloadURL;
        this.changeFromButtonToPic(photoName);
      });
  }