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"status": "API not exposed", "detail": "Published encode/decode API has no sequence control or timing result", "runtime": "public API inspection", "sourceReport": "survey.json" }, { "subject": "jsquash", "feature": "ICC", "status": "API not exposed", "detail": "ImageData result contains no original metadata", "runtime": "public API inspection", "sourceReport": "survey.json" }, { "subject": "jsquash", "feature": "metadata access", "status": "API not exposed", "detail": "ImageData result contains no original metadata", "runtime": "public API inspection", "sourceReport": "survey.json" }, { "subject": "jsquash", "feature": "incremental input", "status": "API not exposed", "detail": "Only whole ArrayBuffer decode is exposed", "runtime": "public API inspection", "sourceReport": "survey.json" }, { "subject": "jsquash", "feature": "early progressive output", "status": "API not exposed", "detail": "Only whole ArrayBuffer decode is exposed", "runtime": "public API inspection", "sourceReport": 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"runtime": "node/browser", "sourceReport": null }, { "subject": "jsquash", "feature": "lossy native 16-bit encode/decode", "status": "not tested", "detail": "No claim from a file opening or from native engine capability; outside the finite measured subset", "runtime": "node/browser", "sourceReport": null }, { "subject": "oxide", "feature": "frame timing", "status": "incorrect output", "detail": "Error: Semantic mismatch: [3000,5000] vs [0.003,0.005]", "probe": "animation decode, frame timing and frame access", "runtime": "node", "sourceReport": "benchmark/jpegxl/comparison/results/specialized-node.json", "maturity": null }, { "subject": "oxide", "feature": "animation decode", "status": "verified", "detail": "All declared assertions passed", "evidence": { "frameIndex": 1, "width": 2, "height": 2, "loops": 2, "sha256": "5b9f726fd1efd70ab926936f1f8460184ae54260feef26a5957b6458c277f44b", "scope": "Full replacement frame; timing qualified separately" }, "probe": "animation frame access and 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"node/browser", "sourceReport": null }, { "subject": "oxide", "feature": "multithread speedup", "status": "not tested", "detail": "No claim from a file opening or from native engine capability; outside the finite measured subset", "runtime": "node/browser", "sourceReport": null }, { "subject": "oxide", "feature": "lossy native 16-bit encode/decode", "status": "not tested", "detail": "No claim from a file opening or from native engine capability; outside the finite measured subset", "runtime": "node/browser", "sourceReport": null }, { "subject": "vips", "feature": "native float samples", "status": "verified", "detail": "All declared assertions passed", "evidence": { "width": 8, "height": 4, "interpretation": "scrgb", "maximum": 3.5, "sha256": "d32541cfab0d9c1d94c2f829378f0bfe5f44122483f47038f44ad410f7ebb531" }, "probe": "native float HDR", "runtime": "node", "sourceReport": "benchmark/jpegxl/comparison/results/specialized-node.json", "maturity": null }, { "subject": "vips", "feature": 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fixtures only; equal effort numbers do not imply equal work; no overall winner score" } ], "preview": { "schemaVersion": 1, "implementationRevision": "590bbf08968f0f12c32bb4aa5c84627ba5dbeab4", "implementationSourceSha256": "088ba519315f3498cd388eaf0c7bef92c0a15c6702107e04219ed486760332ca", "implementationDirty": true, "date": "2026-10-01T14:27:33.046Z", "browser": "151.0.7922.34", "fixture": { "path": "benchmark/fixtures/jpegxl/generated-vardct-v0.12.0/rgb8-distance1-multi-group-progressive.jxl", "sha256": "a4e09109bd4028c7cefbe570728d867b1733a8ea06785fc48e4595e5f5a2c8ef", "bytes": 148917 }, "rows": [ { "subject": "purejsimage", "repeat": 0, "result": { "status": "verified", "firstUsefulMs": 59.80000001192093, "firstTransferred": 20544, "transferredTotal": 67431, "reads": [ { "offset": 0, "requested": 12, "transferred": 12 }, { "offset": 0, "requested": 4096, "transferred": 4096 }, { "offset": 10829, "requested": 4096, "transferred": 4096 }, { "offset": 25, "requested": 10804, 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12, "transferred": 12 }, { "offset": 0, "requested": 4096, "transferred": 4096 }, { "offset": 10829, "requested": 4096, "transferred": 4096 }, { "offset": 25, "requested": 10804, "transferred": 10804 }, { "offset": 10887, "requested": 109, "transferred": 109 }, { "offset": 10996, "requested": 1427, "transferred": 1427 }, { "offset": 12423, "requested": 3069, "transferred": 3069 }, { "offset": 21495, "requested": 6031, "transferred": 6031 }, { "offset": 39944, "requested": 5838, "transferred": 5838 }, { "offset": 83711, "requested": 31949, "transferred": 31949 } ], "stages": [ { "kind": "dc", "width": 16, "height": 16, "groups": [ 0 ] }, { "kind": "pass", "width": 16, "height": 16, "groups": [ 0 ] }, { "kind": "pass", "width": 16, "height": 16, "groups": [ 0 ] }, { "kind": "final", "width": 16, "height": 16, "groups": [ 0 ] } ], "scope": "HTTP Range source, 32x32 region at scale 2; first nonempty pixel block; no canvas upload; geometry-only preview check" } }, { "subject": "purejsimage", "repeat": 2, "result": { "status": "verified", "firstUsefulMs": 60.599999994039536, "firstTransferred": 20544, "transferredTotal": 67431, "reads": [ { "offset": 0, "requested": 12, "transferred": 12 }, { "offset": 0, "requested": 4096, "transferred": 4096 }, { "offset": 10829, "requested": 4096, "transferred": 4096 }, { "offset": 25, "requested": 10804, "transferred": 10804 }, { "offset": 10887, "requested": 109, "transferred": 109 }, { "offset": 10996, "requested": 1427, "transferred": 1427 }, { "offset": 12423, "requested": 3069, "transferred": 3069 }, { "offset": 21495, "requested": 6031, "transferred": 6031 }, { "offset": 39944, "requested": 5838, "transferred": 5838 }, { "offset": 83711, "requested": 31949, "transferred": 31949 } ], "stages": [ { "kind": "dc", "width": 16, "height": 16, "groups": [ 0 ] }, { "kind": "pass", "width": 16, "height": 16, "groups": [ 0 ] }, { "kind": "pass", "width": 16, "height": 16, "groups": [ 0 ] }, { "kind": "final", "width": 16, "height": 16, "groups": [ 0 ] } ], "scope": "HTTP Range source, 32x32 region at scale 2; first nonempty pixel block; no canvas upload; geometry-only preview check" } }, { "subject": "oxide", "repeat": 0, "result": { "status": "verified", "firstUsefulMs": 59.099999994039536, "firstTransferred": 4096, "delivered": 4096, "inputBytes": 148917, "pngBytes": 13852, "beforeComplete": true, "reads": [ { "offset": 0, "requested": 4096, "transferred": 4096 } ], "scope": "Sequential 4096-byte HTTP chunks; first render exported to PNG; full frame, no reduced-resolution API, no canvas upload" } }, { "subject": "oxide", "repeat": 1, "result": { "status": "verified", "firstUsefulMs": 66.90000000596046, "firstTransferred": 4096, "delivered": 4096, "inputBytes": 148917, "pngBytes": 13852, "beforeComplete": true, "reads": [ { "offset": 0, "requested": 4096, "transferred": 4096 } ], "scope": "Sequential 4096-byte HTTP chunks; first render exported to PNG; full frame, no reduced-resolution API, no canvas upload" } }, { "subject": "oxide", "repeat": 2, "result": { "status": "verified", "firstUsefulMs": 61.89999997615814, "firstTransferred": 4096, "delivered": 4096, "inputBytes": 148917, "pngBytes": 13852, "beforeComplete": true, "reads": [ { "offset": 0, "requested": 4096, "transferred": 4096 } ], "scope": "Sequential 4096-byte HTTP chunks; first render exported to PNG; full frame, no reduced-resolution API, no canvas upload" } } ], "limitations": "Loopback HTTP, no latency/bandwidth emulation. PureJsImage requests a region at scale 2; oxide renders a full frame and exports PNG. Preview workloads differ and timings must not be ranked as equivalent. Requested and transferred source bytes exclude JS/WASM assets, enumerated separately." }, "limitations": [ "Cold timings cover library import/initialization plus first operation inside a fresh worker/process. Harness startup, file preparation and validation are outside the timed interval.", "Cold timing has one observation per main cell; use cold-repeats report for repeated representative startup measurements.", "Only verified rows may support performance or size comparisons. Failed/unavailable cells remain present with their diagnostic timings.", "No aggregate lossy size ranking at equal numeric options. Quality subset and unresolved brackets remain explicit.", "Browser memory unavailable. Node RSS includes runtime, prepared input, output buffers, WASM and caches; not encoder-managed memory.", "Preview geometry checks do not establish visual fidelity, and the two preview workflows differ.", "Inspected M7 sources are regression evidence, not an unseen generalization set." ] }