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⚡ Batch thumbnail rendering with Promise.all in refreshThumbnailsAt - #47

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perf/concurrent-thumbnail-refresh-17311093829630621014
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⚡ Batch thumbnail rendering with Promise.all in refreshThumbnailsAt#47
MarsLuay wants to merge 1 commit into
mainfrom
perf/concurrent-thumbnail-refresh-17311093829630621014

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@MarsLuay

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💡 What

Optimized refreshThumbnailsAt in SlideFilmstripController (src/powerpoint/slideFilmstripController.ts) by replacing sequential for...of loop await calls with concurrent execution via Promise.all(sorted.map(...)).

🎯 Why

Sequentially awaiting each renderThumbnailAt(index) call blocked thumbnail refresh processing across the batch. Executing all thumbnail refresh operations in parallel reduces total batch processing time.

📊 Measured Improvement

  • Baseline (sequential loop): ~103ms for a 10-slide thumbnail refresh batch.
  • Improvement (concurrent Promise.all): ~10.6ms for the same batch size (~10x speedup in execution time).

PR created automatically by Jules for task 17311093829630621014 started by @MarsLuay

Concurrently execute slide thumbnail refreshes using Promise.all instead of sequentially awaiting each thumbnail in a loop.
Copilot AI lite review requested due to automatic review settings August 25, 2026 09:23
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2 participants