PublishRank 2.9.73 — lossless image optimization

Summary

This maintenance release losslessly recompresses four larger images shipped with PublishRank. Existing filenames, formats, dimensions, color modes, decoded pixels, transparency, animation frame count, timing, and looping are preserved.

Image changes

• assets/images/publishrank-banner-publisher.png: 1,363,475 → 1,264,399 bytes (99,076 bytes saved).
• assets/images/social-share-1200x630.png: 154,943 → 146,849 bytes (8,094 bytes saved).
• assets/icon-128x128.gif: 149,331 → 142,617 bytes (6,714 bytes saved).
• assets/icon-256x256.gif: 405,103 → 384,011 bytes (21,092 bytes saved).

Across all 20 shipped PNG/GIF files, raw image bytes decreased from 4,083,704 to 3,948,728: 134,976 bytes saved (3.31%). The two GIFs retain 24 frames, the original 80 ms per-frame timing, and infinite looping. The other 16 PNGs already had no smaller encoding under lossless PNG recompression, so they were left byte-for-byte unchanged.

The bundled runtime directory assets/vendor/fontawesome-free-7.3.1 contains CSS and font files, not images. Composer’s development-only vendor/ directory has two PHPUnit report SVG icons totaling 538 bytes; they were left unchanged as tiny third-party files and are excluded from the WordPress submission ZIP.

Validation

All 32 standalone PHP regression tests passed. PHP lint passed for production, bootstrap, and test files; node --check passed for JavaScript assets; and git diff --check passed. Composer PHPCS reported 0 errors and 177 existing warnings.

The four recompressed files were compared against their original tracked copies: PNG dimensions, modes, ICC/transparency metadata, and decoded pixel bytes match; GIF dimensions, frame count, loop, per-frame duration, and every composited RGBA frame match. No image was resized, cropped, recolored, converted to another format, or replaced with a remote asset.

The WordPress.org ZIP is generated by tools/build_plugin_zip.py; it excludes Composer development dependencies and test/docs/tooling files.