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json/docs/mkdocs/scripts/figures/data/perf_heldout_validate.json
T
Niels Lohmann b4f3998f94 docs: make the comparison of the 3.13.0 post fairer 
Three reviews of "How it compares" (a maintainer audit of the harness, a
methodology review, a reader's red team) led to a full rerun on the Mac and
x86-64 with simdjson 5.1.1 and new ways in the harness:

- in-place parses with the copy made before the timer ("(copy untimed)",
  never chosen as a library's best) and json_document::parse_copy();
- RapidJSON through StringStream, and with default precision in validate,
  which reads no number;
- BENCH_ONLY takes several prefixes.

The post now gives the copy's real cost (11-14 us for twitter.json on the
Mac, not 30), what yyjson gains without it, the run-to-run noise, the LTO
check, the single-file losses that were missing, and qualifies the headline
claim. Every number in the section and Appendix E is recomputed; the
NUL-byte remark moved out of the body.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
2026-11-03 22:13:24 +01:00

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"variant": "validate_json"
},
"RapidJSON": {
"us": 1459.9,
"variant": "insitu (copy)"
},
"nlohmann json": {
"us": 877.4,
"variant": "accept"
},
"nlohmann json_document": {
"us": 310.5,
"variant": "accept"
},
"serde_json": {
"us": 702.6,
"variant": "from_utf8 + IgnoredAny"
},
"simd-json": {
"us": 856.4,
"variant": "tape (copy)"
},
"simdjson": {
"us": 442.8,
"variant": "DOM"
},
"sonic-rs": {
"us": 628.9,
"variant": "Value"
},
"yyjson": {
"us": 500.9,
"variant": "read"
}
},
"update-center": {
"Boost.JSON": {
"us": 406.2,
"variant": "SAX"
},
"Glaze": {
"us": 681.3,
"variant": "validate_json"
},
"RapidJSON": {
"us": 1555.0,
"variant": "insitu (copy)"
},
"nlohmann json": {
"us": 578.8,
"variant": "accept"
},
"nlohmann json_document": {
"us": 261.3,
"variant": "accept"
},
"serde_json": {
"us": 490.6,
"variant": "from_utf8 + IgnoredAny"
},
"simd-json": {
"us": 650.9,
"variant": "tape (copy)"
},
"simdjson": {
"us": 332.3,
"variant": "DOM"
},
"sonic-rs": {
"us": 383.6,
"variant": "Value"
},
"yyjson": {
"us": 461.4,
"variant": "read"
}
}
}
}
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