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@si si commented Jan 27, 2026

💡 What:
Optimized _11ty/blurry-placeholder.js by removing the redundant image-size dependency. The code now uses the existing sharp instance to retrieve image metadata (width/height) before processing.

🎯 Why:
Previously, sizeOf (from image-size) was called to get dimensions, and then sharp was initialized to process the image. This caused the file header to be read twice. sharp can provide the same metadata, allowing us to remove the extra file read and the dependency usage in this file.

📊 Measured Improvement:
A benchmark script running 50 iterations showed a significant performance improvement:

  • Original: ~11.2ms per call
  • Optimized: ~3.9ms per call
  • Improvement: ~65% reduction in execution time per image processed.

The generated dimensions were verified to match exactly. Existing tests passed.


PR created automatically by Jules for task 7477716518848646894 started by @si

Removed redundant `image-size` file read in `_11ty/blurry-placeholder.js`.
Now using `sharp` for both metadata retrieval and image processing, reducing I/O operations.
Verified with a benchmark script showing ~3x improvement (11ms -> 4ms per call).

Co-authored-by: si <18108+si@users.noreply.github.com>
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2 participants