React Native - Performance drop to 10 fps when rendering an image inside a SectionList - react-native

Question

I have SectionLists inside a horizontal FlatList (react-native-snap-carousel). Each SectionList item represents an entry in a timeline. Some of the items are just text and others also have an image.
While scrolling, every time an image is visible on the screen, the fps drop to less than 10. If I simply comment the <Image> tag so that no image is rendered, the fps go up to 50>fps.
The app on the left has images, the app on the right has <Image /> component commented.
I only tested the app on Android.
Any explanation why the fps drop when an image is displayed?
renderItem:
render() {
const {
containerStyle,
hourStyle,
hourTextStyle,
contentStyle,
iconDashesStyle,
titleText,
descriptionText,
notesText
} = styles;
const activity = this.props.item;
const { type, category, date, note } = activity;
return (
<View style={containerStyle}>
<View style={hourStyle} >
<Text style={hourTextStyle}>
{moment(date).format('HH:mm')}
</Text>
</View>
<View style={iconDashesStyle}>
{this.renderIcons()}
{this.renderDashes()}
</View>
<View style={contentStyle}>
<Text style={titleText}>{getActivityName(type, category).toUpperCase()}</Text>
<Text style={descriptionText}>{getActivityDescription(activity)}</Text>
<Text style={notesText}>{note}</Text>
{this.renderImage()}
</View>
</View>
);
}
renderImage function:
renderImage() {
const { type } = this.props.item;
if (type === ID_SHARE_MOMENT && this.props.image) {
const { uri, ratio } = this.props.image;
return (
<View
ref={r => (this.imgRef = r)}
style={[styles.momentImgContainer, { aspectRatio: ratio }]}
collapsable={false}
>
<TouchableOpacity onPress={this.onPressImage}>
<Image
style={styles.momentImg}
source={{ uri }}
resizeMode='cover'
/>
</TouchableOpacity>
</View>
);
}
}
The second app without images has the renderImage as follows:
<TouchableOpacity onPress={this.onPressImage}>
{ /*
<Image
style={styles.momentImg}
source={{ uri }}
resizeMode='cover'
/>
*/ }
</TouchableOpacity>
Edit 1
While trying to improve the performance of my app, I followed this link of Adam Stanford on medium, which suggested to load static assets directly from the app package (images included via Xcode asset catalogs or in the Android drawable folder).
I started with the background image of the entry screen that precedes the screen shown above, which only has a background image, a logo, and a spinner:
Only by doing this in this first image, look what happened:
The fps went up to 40+ even when rendering the images in the timeline. However, I do not understand the relation...