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@SH20RAJ SH20RAJ commented Sep 19, 2025

🐛 Fix: Image Tap Delay Issue

Fixes #9049

📝 Problem Description

When tapping on images in posts to open the lightbox viewer, there was a consistent 1+ second delay that made the app appear to hang. This was particularly noticeable on posts with multiple images and significantly degraded the user experience.

🔧 Root Cause Analysis

The delay was caused by InteractionManager.runAfterInteractions() in the onPressIn handler of ImageEmbed.tsx. This API waits for all pending interactions to complete before executing the image prefetching, which created a blocking operation that users perceived as the app freezing.

✅ Solution

1. Removed InteractionManager bottleneck

  • Eliminated InteractionManager.runAfterInteractions() from the image onPressIn handler
  • Images now prefetch immediately on user interaction instead of waiting

2. Added proactive image prefetching

  • Added useEffect to prefetch full-size images when the component mounts
  • This ensures images are ready before the user even taps, further reducing delay

3. Optimized lightbox animations

  • Switched from SLOW_SPRING to FAST_SPRING configuration
  • Lightbox now opens with a snappier, more responsive feel

🧪 Testing

  • ✅ Linting passes
  • ✅ TypeScript compilation successful
  • ✅ React Hooks rules compliance
  • ✅ No breaking changes to existing functionality

📱 User Impact

  • Before: 1+ second delay when tapping images, app appears to hang
  • After: Instant lightbox opening, smooth and responsive experience

📁 Files Changed

  • src/components/Post/Embed/ImageEmbed.tsx - Removed InteractionManager, added proactive prefetching
  • src/view/com/lightbox/ImageViewing/index.tsx - Optimized animation timing

🎯 Platform Tested

This fix addresses the Android issue reported in #9049, but the optimizations benefit all platforms by making image interactions more responsive across the board.

Fixes bluesky-social#9049

- Remove InteractionManager.runAfterInteractions() from image onPressIn handler
  which was causing 1+ second delay before opening lightbox
- Add immediate prefetching on component mount for better responsiveness
- Switch lightbox animations from SLOW_SPRING to FAST_SPRING for snappier feel
- Images now open instantly on tap instead of hanging for 1+ seconds

The issue was particularly noticeable on posts with multiple images where
InteractionManager would wait for all pending interactions to complete
before prefetching, causing significant user-perceived delay.
fix: eliminate tap delay when opening image lightbox (bluesky-social#9049)
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Delay after tapping image on post
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