BlazeDiff v2 – Fastest image diff with native binary and SIMD
Started with a pure JS implementation (still the fastest JS image diff), but wanted to push performance further. I rewrote the core in Rust to make it the fastest open-source single-threaded image diff. On 4K images (5600×3200): ~327ms vs odiff's ~1215ms. Binaries are ~3x smaller too (~700KB vs ~2MB). The core insight: make the cold pass smarter to make the hot pass do less work. Instead of simple pixel equality, the cold pass scans dynamic-sized blocks and marks "problematic" ones - blocks that might contain differences. The hot pass then only runs YIQ perceptual diff and antialiasing check…
BlazeDiff v2 – Fastest image diff with native binary and SIMD launched on December 19, 2025 with 7 votes, #1,248 of 11,628 launches that month and more than 75% of that year's launches.
What it does
Blazing-fast diff ecosystem for JavaScript applications - teimurjan/blazediff
In the maker’s words, at launch
Started with a pure JS implementation (still the fastest JS image diff), but wanted to push performance further. I rewrote the core in Rust to make it the fastest open-source single-threaded image diff. On 4K images (5600×3200): ~327ms vs odiff's ~1215ms. Binaries are ~3x smaller too (~700KB vs ~2MB). The core…
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