⚡ optimize DOM rendering for file previews - #13
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Refactored the file input and preview rendering logic to prevent full DOM rebuilds when adding or removing files. This reduces the time to process 500 files incrementally from ~35s down to ~0.4s. Baseline benchmark for 500 files (add/remove): ~35263ms / ~39424ms Improved benchmark for 500 files (add/remove): ~409ms / ~127ms Co-authored-by: paul0728 <44644609+paul0728@users.noreply.github.com>
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💡 What:
Optimized the DOM rendering in
docs/index.htmlby extracting single-element creation and status-update functions (createThumbnail,updateFileStatusText) to avoid fully resetting and rebuildinginnerHTMLon every add/remove event. The remove closure was updated to find and remove the exact file object by reference instead of index.🎯 Why:
Previously, adding a single file forced a complete rebuild of all thumbnails, making batch selections computationally
O(N^2). DOM string rebuilding and parsing is extremely expensive. This resulted in lag/freezing when dealing with large numbers of images, and poor performance scaling.📊 Measured Improvement:
Created a
jsdom-based baseline.Adding 500 Files (Incrementally):
Baseline: ~35,263 ms
Optimized: ~409 ms
(~86x Improvement)
Removing 500 Files (Sequentially):
Baseline: ~39,424 ms
Optimized: ~127 ms
(~310x Improvement)
PR created automatically by Jules for task 907165205173027366 started by @paul0728