mirror of
https://github.com/profullstack/logicsrc.git
synced 2026-10-01 20:33:50 +00:00
Anthony Ettinger
9f42ce222a
Adds a reports section to the OpenStream spec so its claims rest on a reproducible measurement rather than an assertion. Each report is a run of the envelope over a defined corpus on real hardware: proof that decompression restores every byte, that an incompressible input costs only the framing overhead, that a compressible one saves what it claims against the complete wire size, and how long each codec takes. - docs/openstream/reports/ holds a machine-readable <id>.json (canonical, with a versioned schema) and a rendered <id>.md per report, plus a README on the shape and on submitting one. The seed report is nixamp 0.17.1 over the synthetic corpus, labelled synthetic so no one reads a padded-fixture number as production. - The site renders them at /docs/openstream/reports (index) and /docs/openstream/reports/<id> (one report), under the dynamic /docs/[slug] tree so the reports routes never shadow a spec's own doc page. A small lib/reports.ts reads the JSON at build time; REPORTED_SPECS keeps the route surface explicit. sitemap includes the index and every report. - The spec doc gains a Benchmark reports section linking there, and repeats the honest caveats: OpenStream frames Zstandard and gzip rather than being a new algorithm, synthetic padding flatters a codec, an efficient real feed saves little, and round-trip exactness is the one pass/fail. The report format is produced by `nixamp compression benchmark` (in the nixamp repo); a release runs it and commits the two files here. Claude-Session: https://claude.ai/code/session_01MxNif5tsYq4LczgG7aE8Jp Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
793 lines
No EOL
20 KiB
JSON
793 lines
No EOL
20 KiB
JSON
{
|
|
"schema": 1,
|
|
"spec": "openstream",
|
|
"specVersion": "NXS1",
|
|
"generatedAt": "2026-09-12T13:13:15.713Z",
|
|
"implementation": {
|
|
"name": "nixamp",
|
|
"version": "0.17.1"
|
|
},
|
|
"environment": {
|
|
"runtime": "bun 1.4.0",
|
|
"zstd": "f8745da6ff1ad1e7bab384bd1f9d742439278e99",
|
|
"zlib": "12731092979c6d07f42da27da673a9f6c7b13586",
|
|
"os": "linux 7.0.0-30-generic",
|
|
"arch": "x64",
|
|
"cpu": "DO-Premium-Intel",
|
|
"cores": 8,
|
|
"memoryGiB": 15.6
|
|
},
|
|
"envelope": {
|
|
"magic": "NXS1",
|
|
"streamHeaderBytes": 16,
|
|
"frameHeaderBytes": 48
|
|
},
|
|
"policy": {
|
|
"minSavingsPercent": 3,
|
|
"minSavingsBytes": 512,
|
|
"maxBlockBytes": 262144,
|
|
"zstdLevels": [
|
|
1,
|
|
3,
|
|
9
|
|
]
|
|
},
|
|
"samples": [
|
|
{
|
|
"sample": "random-1mib",
|
|
"kind": "synthetic",
|
|
"inputBytes": 1048576,
|
|
"sha256": "562a223dca6ae12049e4e88ded6b6c0c7d18f29d5b941309fcd1f5cc19bc15b0",
|
|
"container": "bytes",
|
|
"rows": [
|
|
{
|
|
"mode": "stored",
|
|
"level": 0,
|
|
"blocks": 4,
|
|
"inputBytes": 1048576,
|
|
"payloadBytes": 1048576,
|
|
"wireBytes": 1048832,
|
|
"storedBlocks": 4,
|
|
"compressedBlocks": 0,
|
|
"savingsPercent": -0.02,
|
|
"encodeMs": 0,
|
|
"decodeMs": 0,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "gzip",
|
|
"level": 6,
|
|
"blocks": 4,
|
|
"inputBytes": 1048576,
|
|
"payloadBytes": 1048576,
|
|
"wireBytes": 1048832,
|
|
"storedBlocks": 4,
|
|
"compressedBlocks": 0,
|
|
"savingsPercent": -0.02,
|
|
"encodeMs": 51.89,
|
|
"decodeMs": 0,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "zstd",
|
|
"level": 1,
|
|
"blocks": 4,
|
|
"inputBytes": 1048576,
|
|
"payloadBytes": 1048576,
|
|
"wireBytes": 1048832,
|
|
"storedBlocks": 4,
|
|
"compressedBlocks": 0,
|
|
"savingsPercent": -0.02,
|
|
"encodeMs": 7.69,
|
|
"decodeMs": 0,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "zstd",
|
|
"level": 3,
|
|
"blocks": 4,
|
|
"inputBytes": 1048576,
|
|
"payloadBytes": 1048576,
|
|
"wireBytes": 1048832,
|
|
"storedBlocks": 4,
|
|
"compressedBlocks": 0,
|
|
"savingsPercent": -0.02,
|
|
"encodeMs": 6.04,
|
|
"decodeMs": 0,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "zstd",
|
|
"level": 9,
|
|
"blocks": 4,
|
|
"inputBytes": 1048576,
|
|
"payloadBytes": 1048576,
|
|
"wireBytes": 1048832,
|
|
"storedBlocks": 4,
|
|
"compressedBlocks": 0,
|
|
"savingsPercent": -0.02,
|
|
"encodeMs": 8.08,
|
|
"decodeMs": 0,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "ts-zstd",
|
|
"level": 1,
|
|
"blocks": 1,
|
|
"inputBytes": 1048576,
|
|
"payloadBytes": 0,
|
|
"wireBytes": 64,
|
|
"storedBlocks": 0,
|
|
"compressedBlocks": 0,
|
|
"savingsPercent": 99.99,
|
|
"encodeMs": 0,
|
|
"decodeMs": 0,
|
|
"roundTrip": false,
|
|
"note": "not a transport stream: ts-zstd does not apply"
|
|
}
|
|
],
|
|
"recommendation": {
|
|
"mode": "stored",
|
|
"level": 0,
|
|
"reason": "no codec beat stored by the configured margin"
|
|
}
|
|
},
|
|
{
|
|
"sample": "zeros-1mib",
|
|
"kind": "synthetic",
|
|
"inputBytes": 1048576,
|
|
"sha256": "30e14955ebf1352266dc2ff8067e68104607e750abb9d3b36582b8af909fcb58",
|
|
"container": "bytes",
|
|
"rows": [
|
|
{
|
|
"mode": "stored",
|
|
"level": 0,
|
|
"blocks": 4,
|
|
"inputBytes": 1048576,
|
|
"payloadBytes": 1048576,
|
|
"wireBytes": 1048832,
|
|
"storedBlocks": 4,
|
|
"compressedBlocks": 0,
|
|
"savingsPercent": -0.02,
|
|
"encodeMs": 0,
|
|
"decodeMs": 0,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "gzip",
|
|
"level": 6,
|
|
"blocks": 4,
|
|
"inputBytes": 1048576,
|
|
"payloadBytes": 1156,
|
|
"wireBytes": 1412,
|
|
"storedBlocks": 0,
|
|
"compressedBlocks": 4,
|
|
"savingsPercent": 99.87,
|
|
"encodeMs": 2.14,
|
|
"decodeMs": 5.25,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "zstd",
|
|
"level": 1,
|
|
"blocks": 4,
|
|
"inputBytes": 1048576,
|
|
"payloadBytes": 116,
|
|
"wireBytes": 372,
|
|
"storedBlocks": 0,
|
|
"compressedBlocks": 4,
|
|
"savingsPercent": 99.96,
|
|
"encodeMs": 2.1,
|
|
"decodeMs": 6.9,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "zstd",
|
|
"level": 3,
|
|
"blocks": 4,
|
|
"inputBytes": 1048576,
|
|
"payloadBytes": 116,
|
|
"wireBytes": 372,
|
|
"storedBlocks": 0,
|
|
"compressedBlocks": 4,
|
|
"savingsPercent": 99.96,
|
|
"encodeMs": 2.38,
|
|
"decodeMs": 4.25,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "zstd",
|
|
"level": 9,
|
|
"blocks": 4,
|
|
"inputBytes": 1048576,
|
|
"payloadBytes": 112,
|
|
"wireBytes": 368,
|
|
"storedBlocks": 0,
|
|
"compressedBlocks": 4,
|
|
"savingsPercent": 99.96,
|
|
"encodeMs": 7.79,
|
|
"decodeMs": 5.76,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "ts-zstd",
|
|
"level": 1,
|
|
"blocks": 1,
|
|
"inputBytes": 1048576,
|
|
"payloadBytes": 0,
|
|
"wireBytes": 64,
|
|
"storedBlocks": 0,
|
|
"compressedBlocks": 0,
|
|
"savingsPercent": 99.99,
|
|
"encodeMs": 0,
|
|
"decodeMs": 0,
|
|
"roundTrip": false,
|
|
"note": "not a transport stream: ts-zstd does not apply"
|
|
}
|
|
],
|
|
"recommendation": {
|
|
"mode": "zstd",
|
|
"level": 9,
|
|
"reason": "saves 99.96% of the complete wire size"
|
|
}
|
|
},
|
|
{
|
|
"sample": "text-repeat-1mib",
|
|
"kind": "synthetic",
|
|
"inputBytes": 1048576,
|
|
"sha256": "d05bf128d112bfd591628a68880676f643191beeb91d1250ce8c98212bf6e464",
|
|
"container": "bytes",
|
|
"rows": [
|
|
{
|
|
"mode": "stored",
|
|
"level": 0,
|
|
"blocks": 4,
|
|
"inputBytes": 1048576,
|
|
"payloadBytes": 1048576,
|
|
"wireBytes": 1048832,
|
|
"storedBlocks": 4,
|
|
"compressedBlocks": 0,
|
|
"savingsPercent": -0.02,
|
|
"encodeMs": 0,
|
|
"decodeMs": 0,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "gzip",
|
|
"level": 6,
|
|
"blocks": 4,
|
|
"inputBytes": 1048576,
|
|
"payloadBytes": 6946,
|
|
"wireBytes": 7202,
|
|
"storedBlocks": 0,
|
|
"compressedBlocks": 4,
|
|
"savingsPercent": 99.31,
|
|
"encodeMs": 2.02,
|
|
"decodeMs": 4.48,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "zstd",
|
|
"level": 1,
|
|
"blocks": 4,
|
|
"inputBytes": 1048576,
|
|
"payloadBytes": 324,
|
|
"wireBytes": 580,
|
|
"storedBlocks": 0,
|
|
"compressedBlocks": 4,
|
|
"savingsPercent": 99.94,
|
|
"encodeMs": 1.62,
|
|
"decodeMs": 12.04,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "zstd",
|
|
"level": 3,
|
|
"blocks": 4,
|
|
"inputBytes": 1048576,
|
|
"payloadBytes": 318,
|
|
"wireBytes": 574,
|
|
"storedBlocks": 0,
|
|
"compressedBlocks": 4,
|
|
"savingsPercent": 99.95,
|
|
"encodeMs": 1.82,
|
|
"decodeMs": 3.89,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "zstd",
|
|
"level": 9,
|
|
"blocks": 4,
|
|
"inputBytes": 1048576,
|
|
"payloadBytes": 316,
|
|
"wireBytes": 572,
|
|
"storedBlocks": 0,
|
|
"compressedBlocks": 4,
|
|
"savingsPercent": 99.95,
|
|
"encodeMs": 2.78,
|
|
"decodeMs": 3.18,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "ts-zstd",
|
|
"level": 1,
|
|
"blocks": 1,
|
|
"inputBytes": 1048576,
|
|
"payloadBytes": 0,
|
|
"wireBytes": 64,
|
|
"storedBlocks": 0,
|
|
"compressedBlocks": 0,
|
|
"savingsPercent": 99.99,
|
|
"encodeMs": 0,
|
|
"decodeMs": 0,
|
|
"roundTrip": false,
|
|
"note": "not a transport stream: ts-zstd does not apply"
|
|
}
|
|
],
|
|
"recommendation": {
|
|
"mode": "zstd",
|
|
"level": 9,
|
|
"reason": "saves 99.95% of the complete wire size"
|
|
}
|
|
},
|
|
{
|
|
"sample": "ts-padded-50pct",
|
|
"kind": "synthetic",
|
|
"inputBytes": 752000,
|
|
"sha256": "fbbe8a14abcd5d36e40ccf8d5d80eca805580cccd632842a4f1cea9461863a6d",
|
|
"container": "mpegts",
|
|
"rows": [
|
|
{
|
|
"mode": "stored",
|
|
"level": 0,
|
|
"blocks": 3,
|
|
"inputBytes": 752000,
|
|
"payloadBytes": 752000,
|
|
"wireBytes": 752208,
|
|
"storedBlocks": 3,
|
|
"compressedBlocks": 0,
|
|
"savingsPercent": -0.03,
|
|
"encodeMs": 0,
|
|
"decodeMs": 0,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "gzip",
|
|
"level": 6,
|
|
"blocks": 3,
|
|
"inputBytes": 752000,
|
|
"payloadBytes": 379358,
|
|
"wireBytes": 379566,
|
|
"storedBlocks": 0,
|
|
"compressedBlocks": 3,
|
|
"savingsPercent": 49.53,
|
|
"encodeMs": 13.4,
|
|
"decodeMs": 4.05,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "zstd",
|
|
"level": 1,
|
|
"blocks": 3,
|
|
"inputBytes": 752000,
|
|
"payloadBytes": 377821,
|
|
"wireBytes": 378029,
|
|
"storedBlocks": 0,
|
|
"compressedBlocks": 3,
|
|
"savingsPercent": 49.73,
|
|
"encodeMs": 3.59,
|
|
"decodeMs": 4.18,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "zstd",
|
|
"level": 3,
|
|
"blocks": 3,
|
|
"inputBytes": 752000,
|
|
"payloadBytes": 375595,
|
|
"wireBytes": 375803,
|
|
"storedBlocks": 0,
|
|
"compressedBlocks": 3,
|
|
"savingsPercent": 50.03,
|
|
"encodeMs": 5.7,
|
|
"decodeMs": 3.53,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "zstd",
|
|
"level": 9,
|
|
"blocks": 3,
|
|
"inputBytes": 752000,
|
|
"payloadBytes": 375109,
|
|
"wireBytes": 375317,
|
|
"storedBlocks": 0,
|
|
"compressedBlocks": 3,
|
|
"savingsPercent": 50.09,
|
|
"encodeMs": 17.19,
|
|
"decodeMs": 4.56,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "ts-zstd",
|
|
"level": 1,
|
|
"blocks": 3,
|
|
"inputBytes": 752000,
|
|
"payloadBytes": 375481,
|
|
"wireBytes": 375689,
|
|
"storedBlocks": 0,
|
|
"compressedBlocks": 3,
|
|
"savingsPercent": 50.04,
|
|
"encodeMs": 9.3,
|
|
"decodeMs": 9.8,
|
|
"roundTrip": true
|
|
}
|
|
],
|
|
"recommendation": {
|
|
"mode": "zstd",
|
|
"level": 9,
|
|
"reason": "saves 50.09% of the complete wire size"
|
|
}
|
|
},
|
|
{
|
|
"sample": "ts-unpadded",
|
|
"kind": "synthetic",
|
|
"inputBytes": 752000,
|
|
"sha256": "675352f64a65d9ec2c3d7b69f11bb253cd882c3fcea85dd4a994675b5767c2c5",
|
|
"container": "mpegts",
|
|
"rows": [
|
|
{
|
|
"mode": "stored",
|
|
"level": 0,
|
|
"blocks": 3,
|
|
"inputBytes": 752000,
|
|
"payloadBytes": 752000,
|
|
"wireBytes": 752208,
|
|
"storedBlocks": 3,
|
|
"compressedBlocks": 0,
|
|
"savingsPercent": -0.03,
|
|
"encodeMs": 0,
|
|
"decodeMs": 0,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "gzip",
|
|
"level": 6,
|
|
"blocks": 3,
|
|
"inputBytes": 752000,
|
|
"payloadBytes": 752000,
|
|
"wireBytes": 752208,
|
|
"storedBlocks": 3,
|
|
"compressedBlocks": 0,
|
|
"savingsPercent": -0.03,
|
|
"encodeMs": 26.52,
|
|
"decodeMs": 0,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "zstd",
|
|
"level": 1,
|
|
"blocks": 3,
|
|
"inputBytes": 752000,
|
|
"payloadBytes": 752000,
|
|
"wireBytes": 752208,
|
|
"storedBlocks": 3,
|
|
"compressedBlocks": 0,
|
|
"savingsPercent": -0.03,
|
|
"encodeMs": 3.62,
|
|
"decodeMs": 0,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "zstd",
|
|
"level": 3,
|
|
"blocks": 3,
|
|
"inputBytes": 752000,
|
|
"payloadBytes": 752000,
|
|
"wireBytes": 752208,
|
|
"storedBlocks": 3,
|
|
"compressedBlocks": 0,
|
|
"savingsPercent": -0.03,
|
|
"encodeMs": 8.11,
|
|
"decodeMs": 0,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "zstd",
|
|
"level": 9,
|
|
"blocks": 3,
|
|
"inputBytes": 752000,
|
|
"payloadBytes": 752000,
|
|
"wireBytes": 752208,
|
|
"storedBlocks": 3,
|
|
"compressedBlocks": 0,
|
|
"savingsPercent": -0.03,
|
|
"encodeMs": 17.49,
|
|
"decodeMs": 0,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "ts-zstd",
|
|
"level": 1,
|
|
"blocks": 3,
|
|
"inputBytes": 752000,
|
|
"payloadBytes": 752000,
|
|
"wireBytes": 752208,
|
|
"storedBlocks": 3,
|
|
"compressedBlocks": 0,
|
|
"savingsPercent": -0.03,
|
|
"encodeMs": 6.1,
|
|
"decodeMs": 0,
|
|
"roundTrip": true
|
|
}
|
|
],
|
|
"recommendation": {
|
|
"mode": "stored",
|
|
"level": 0,
|
|
"reason": "no codec beat stored by the configured margin"
|
|
}
|
|
},
|
|
{
|
|
"sample": "tiny-3b",
|
|
"kind": "synthetic",
|
|
"inputBytes": 3,
|
|
"sha256": "ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad",
|
|
"container": "bytes",
|
|
"rows": [
|
|
{
|
|
"mode": "stored",
|
|
"level": 0,
|
|
"blocks": 1,
|
|
"inputBytes": 3,
|
|
"payloadBytes": 3,
|
|
"wireBytes": 115,
|
|
"storedBlocks": 1,
|
|
"compressedBlocks": 0,
|
|
"savingsPercent": -3733.33,
|
|
"encodeMs": 0,
|
|
"decodeMs": 0,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "gzip",
|
|
"level": 6,
|
|
"blocks": 1,
|
|
"inputBytes": 3,
|
|
"payloadBytes": 3,
|
|
"wireBytes": 115,
|
|
"storedBlocks": 1,
|
|
"compressedBlocks": 0,
|
|
"savingsPercent": -3733.33,
|
|
"encodeMs": 0.37,
|
|
"decodeMs": 0,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "zstd",
|
|
"level": 1,
|
|
"blocks": 1,
|
|
"inputBytes": 3,
|
|
"payloadBytes": 3,
|
|
"wireBytes": 115,
|
|
"storedBlocks": 1,
|
|
"compressedBlocks": 0,
|
|
"savingsPercent": -3733.33,
|
|
"encodeMs": 0.22,
|
|
"decodeMs": 0,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "zstd",
|
|
"level": 3,
|
|
"blocks": 1,
|
|
"inputBytes": 3,
|
|
"payloadBytes": 3,
|
|
"wireBytes": 115,
|
|
"storedBlocks": 1,
|
|
"compressedBlocks": 0,
|
|
"savingsPercent": -3733.33,
|
|
"encodeMs": 0.18,
|
|
"decodeMs": 0,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "zstd",
|
|
"level": 9,
|
|
"blocks": 1,
|
|
"inputBytes": 3,
|
|
"payloadBytes": 3,
|
|
"wireBytes": 115,
|
|
"storedBlocks": 1,
|
|
"compressedBlocks": 0,
|
|
"savingsPercent": -3733.33,
|
|
"encodeMs": 0.18,
|
|
"decodeMs": 0,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "ts-zstd",
|
|
"level": 1,
|
|
"blocks": 1,
|
|
"inputBytes": 3,
|
|
"payloadBytes": 0,
|
|
"wireBytes": 64,
|
|
"storedBlocks": 0,
|
|
"compressedBlocks": 0,
|
|
"savingsPercent": -2033.33,
|
|
"encodeMs": 0,
|
|
"decodeMs": 0,
|
|
"roundTrip": false,
|
|
"note": "not a transport stream: ts-zstd does not apply"
|
|
}
|
|
],
|
|
"recommendation": {
|
|
"mode": "stored",
|
|
"level": 0,
|
|
"reason": "no codec beat stored by the configured margin"
|
|
}
|
|
},
|
|
{
|
|
"sample": "empty",
|
|
"kind": "synthetic",
|
|
"inputBytes": 0,
|
|
"sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
|
|
"container": "bytes",
|
|
"rows": [
|
|
{
|
|
"mode": "stored",
|
|
"level": 0,
|
|
"blocks": 0,
|
|
"inputBytes": 0,
|
|
"payloadBytes": 0,
|
|
"wireBytes": 64,
|
|
"storedBlocks": 0,
|
|
"compressedBlocks": 0,
|
|
"savingsPercent": 0,
|
|
"encodeMs": 0,
|
|
"decodeMs": 0,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "gzip",
|
|
"level": 6,
|
|
"blocks": 0,
|
|
"inputBytes": 0,
|
|
"payloadBytes": 0,
|
|
"wireBytes": 64,
|
|
"storedBlocks": 0,
|
|
"compressedBlocks": 0,
|
|
"savingsPercent": 0,
|
|
"encodeMs": 0,
|
|
"decodeMs": 0,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "zstd",
|
|
"level": 1,
|
|
"blocks": 0,
|
|
"inputBytes": 0,
|
|
"payloadBytes": 0,
|
|
"wireBytes": 64,
|
|
"storedBlocks": 0,
|
|
"compressedBlocks": 0,
|
|
"savingsPercent": 0,
|
|
"encodeMs": 0,
|
|
"decodeMs": 0,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "zstd",
|
|
"level": 3,
|
|
"blocks": 0,
|
|
"inputBytes": 0,
|
|
"payloadBytes": 0,
|
|
"wireBytes": 64,
|
|
"storedBlocks": 0,
|
|
"compressedBlocks": 0,
|
|
"savingsPercent": 0,
|
|
"encodeMs": 0,
|
|
"decodeMs": 0,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "zstd",
|
|
"level": 9,
|
|
"blocks": 0,
|
|
"inputBytes": 0,
|
|
"payloadBytes": 0,
|
|
"wireBytes": 64,
|
|
"storedBlocks": 0,
|
|
"compressedBlocks": 0,
|
|
"savingsPercent": 0,
|
|
"encodeMs": 0,
|
|
"decodeMs": 0,
|
|
"roundTrip": true
|
|
},
|
|
{
|
|
"mode": "ts-zstd",
|
|
"level": 1,
|
|
"blocks": 0,
|
|
"inputBytes": 0,
|
|
"payloadBytes": 0,
|
|
"wireBytes": 64,
|
|
"storedBlocks": 0,
|
|
"compressedBlocks": 0,
|
|
"savingsPercent": 0,
|
|
"encodeMs": 0,
|
|
"decodeMs": 0,
|
|
"roundTrip": true
|
|
}
|
|
],
|
|
"recommendation": {
|
|
"mode": "stored",
|
|
"level": 0,
|
|
"reason": "no codec beat stored by the configured margin"
|
|
}
|
|
}
|
|
],
|
|
"summary": {
|
|
"corpusBytes": 4649731,
|
|
"byMode": [
|
|
{
|
|
"mode": "stored",
|
|
"level": 0,
|
|
"wireBytes": 4651091,
|
|
"savingsPercent": -0.03,
|
|
"roundTrip": true,
|
|
"encodeMs": 0,
|
|
"decodeMs": 0
|
|
},
|
|
{
|
|
"mode": "gzip",
|
|
"level": 6,
|
|
"wireBytes": 2189399,
|
|
"savingsPercent": 52.91,
|
|
"roundTrip": true,
|
|
"encodeMs": 96.34,
|
|
"decodeMs": 13.78
|
|
},
|
|
{
|
|
"mode": "zstd",
|
|
"level": 1,
|
|
"wireBytes": 2180200,
|
|
"savingsPercent": 53.11,
|
|
"roundTrip": true,
|
|
"encodeMs": 18.84,
|
|
"decodeMs": 23.12
|
|
},
|
|
{
|
|
"mode": "zstd",
|
|
"level": 3,
|
|
"wireBytes": 2177968,
|
|
"savingsPercent": 53.16,
|
|
"roundTrip": true,
|
|
"encodeMs": 24.23,
|
|
"decodeMs": 11.67
|
|
},
|
|
{
|
|
"mode": "zstd",
|
|
"level": 9,
|
|
"wireBytes": 2177476,
|
|
"savingsPercent": 53.17,
|
|
"roundTrip": true,
|
|
"encodeMs": 53.51,
|
|
"decodeMs": 13.5
|
|
},
|
|
{
|
|
"mode": "ts-zstd",
|
|
"level": 1,
|
|
"wireBytes": 1127961,
|
|
"savingsPercent": 25,
|
|
"roundTrip": true,
|
|
"encodeMs": 15.4,
|
|
"decodeMs": 9.8
|
|
}
|
|
]
|
|
},
|
|
"caveats": [
|
|
"Envelope v1: a 16-byte stream header, a 48-byte header per frame, plus one end frame.",
|
|
"OpenStream is a framing envelope over Zstandard and gzip, not a new compression algorithm; these numbers are those codecs at the block boundary, honestly framed.",
|
|
"Synthetic samples do not predict production savings. A padded transport stream flatters a codec by its padding; an efficient real feed saves far less. Use --corpus with authorized real samples for numbers that mean something.",
|
|
"Timings are wall-clock on the machine and runtime named in `environment` and do not transfer to other hardware.",
|
|
"roundTrip:false in any row is a failure of exactness and must block a release."
|
|
]
|
|
} |