Real 4K (3840×2160 · 24.9 MB Raw) & 8K (7680×4320 · 99.5 MB Raw) Multi-Worker SIMD Benchmarks

Live 4K & 8K Browser Decode + Multi-Threaded Corpus

Choose a real 4K (8.29 MP) or 8K (33.18 MP) photograph below to benchmark hash-verified files across 1 to 16 WebAssembly SIMD workers (`ImiDecoder` / `ImiRegionDecoder`), compare IMI decoder-speed modes (SplitHuf Fast, Fastest, RunLevel rANS, Quick Packets, Lossless e10) against native browser createImageBitmap (JPEG XL, AVIF, Progressive JPEG, WebP, PNG), and view the decoded 4K/8K raster on the canvas.

1. Choose a Real 4K / 8K Scene & Run Live Multi-Worker SIMD Trials

IMI Worker Counts to Test Trials per Case Ready · click Run above or click any row's ▶ button below.

4K / 8K Case & Decoder	Mode	File Size	bpp	Raw:Encoded	Fetch (ms)	Decode (ms)	Speed (MP/s)	Action

2. Recorded Multi-Threaded Native & Browser Corpus (Click Any Header to Sort)

Workload / Image Class Mode

Compression vs. Decode Speed: On both 4K and 8K NASA Blue Marble lossless crops, JPEG XL lossless achieves the lowest bits-per-pixel (6.795 bpp at 4K; 5.687 bpp at 8K), ahead of WebP lossless (7.454 / 6.559 bpp), IMI lossless e10 (8.135 / 7.147 bpp), and crushed PNG (9.798 / 8.237 bpp). IMI trades ~15–20% file size against JPEG XL for high-throughput 1–16 worker SIMD decode in both native code and browser WebAssembly.

Image / Workload	Codec & Decoder-Speed Mode	Type	Bits/Pixel (bpp)	Raw:Encoded	SSIMULACRA2	1T / 1W Decode (MP/s)	4T / 4W Decode (MP/s)	8T / 8W Decode (MP/s)	16W Batch (MP/s)