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Docs: compile times of JSON_HAS_STD_FORMAT=0 and JSON_HAS_RANGES=0 (#6025)
Add sections on switching off std::format and ranges support to the compile-times page, with measurements (Apple clang, GCC 16, -std=c++20), the functionality that is lost, and chart rows (issue #5294). Signed-off-by: Niels Lohmann <mail@nlohmann.me>
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<svg class="nj-fig nj-charts nj-charts--compile" viewBox="0 0 470 516" role="img" aria-labelledby="nj-charts-ct nj-charts-ct-d" xmlns="http://www.w3.org/2000/svg">
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<svg class="nj-fig nj-charts nj-charts--compile" viewBox="0 0 470 620" role="img" aria-labelledby="nj-charts-ct nj-charts-ct-d" xmlns="http://www.w3.org/2000/svg">
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<title id="nj-charts-ct">Change in compile time against the default configuration at -O0, Apple clang and G​CC 16</title>
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<desc id="nj-charts-ct-d">Grouped horizontal bars, negative is faster. json_fwd.hpp instead of json.hpp on a header-only translation unit: Apple clang -62 %, G​CC 16 -82 %; extern template on a parsing translation unit: Apple clang -7 %, G​CC 16 -21 %; JSON_NO_AUTOMATIC_UDLS on a model translation unit: Apple clang -11 %, G​CC 16 -11 %; JSON_NO_AUTOMATIC_UDLS on a parsing translation unit: Apple clang -1 %, G​CC 16 -2 %; JSON_HAS_FILESYSTEM=0 + JSON_NO_IO on a model translation unit: Apple clang -8 %, G​CC 16 -11 %; JSON_HAS_FILESYSTEM=0 on a model translation unit: Apple clang -5 %, G​CC 16 -9 %; JSON_NO_IO on a model translation unit: Apple clang -2 %, G​CC 16 -2 %; JSON_USE_GLOBAL_UDLS=0 on a model translation unit: Apple clang 0 %, G​CC 16 -1 %.</desc>
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<desc id="nj-charts-ct-d">Grouped horizontal bars, negative is faster. json_fwd.hpp instead of json.hpp on a header-only translation unit: Apple clang -62 %, G​CC 16 -82 %; extern template on a parsing translation unit: Apple clang -7 %, G​CC 16 -21 %; JSON_NO_AUTOMATIC_UDLS on a model translation unit: Apple clang -11 %, G​CC 16 -11 %; JSON_NO_AUTOMATIC_UDLS on a parsing translation unit: Apple clang -1 %, G​CC 16 -2 %; JSON_HAS_FILESYSTEM=0 + JSON_NO_IO on a model translation unit: Apple clang -8 %, G​CC 16 -11 %; JSON_HAS_FILESYSTEM=0 on a model translation unit: Apple clang -5 %, G​CC 16 -9 %; JSON_HAS_STD_FORMAT=0 on a model translation unit: Apple clang -1 %, G​CC 16 -4 %; JSON_HAS_RANGES=0 on a model translation unit: Apple clang -4 %, G​CC 16 -1 %; JSON_NO_IO on a model translation unit: Apple clang -2 %, G​CC 16 -2 %; JSON_USE_GLOBAL_UDLS=0 on a model translation unit: Apple clang 0 %, G​CC 16 -1 %.</desc>
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<rect class="nj-charts-clang" x="8" y="10" width="12" height="12" rx="3"/>
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<text class="nj-charts-leg" x="26" y="20.5">Apple clang</text>
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<rect class="nj-charts-gcc" x="126" y="10" width="12" height="12" rx="3"/>
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<text class="nj-charts-leg" x="144" y="20.5">G​CC 16</text>
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<line class="nj-charts-grid" x1="47.4" y1="58" x2="47.4" y2="472"/>
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<text class="nj-charts-tick" x="47.4" y="488">−80 %</text>
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<line class="nj-charts-grid" x1="126.2" y1="58" x2="126.2" y2="472"/>
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<text class="nj-charts-tick" x="126.2" y="488">−60 %</text>
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<line class="nj-charts-grid" x1="205" y1="58" x2="205" y2="472"/>
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<text class="nj-charts-tick" x="205" y="488">−40 %</text>
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<line class="nj-charts-grid" x1="283.8" y1="58" x2="283.8" y2="472"/>
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<text class="nj-charts-tick" x="283.8" y="488">−20 %</text>
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<text class="nj-charts-tick" x="362.6" y="488">0 %</text>
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<text class="nj-charts-tick nj-charts-tick--l" x="8" y="506">← faster</text>
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<text class="nj-charts-tick nj-charts-tick--r" x="462" y="506">slower →</text>
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<line class="nj-charts-grid" x1="47.4" y1="58" x2="47.4" y2="576"/>
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<text class="nj-charts-tick" x="47.4" y="592">−80 %</text>
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<line class="nj-charts-grid" x1="126.2" y1="58" x2="126.2" y2="576"/>
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<text class="nj-charts-tick" x="126.2" y="592">−60 %</text>
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<line class="nj-charts-grid" x1="205" y1="58" x2="205" y2="576"/>
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<text class="nj-charts-tick" x="205" y="592">−40 %</text>
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<line class="nj-charts-grid" x1="283.8" y1="58" x2="283.8" y2="576"/>
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<text class="nj-charts-tick" x="283.8" y="592">−20 %</text>
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<text class="nj-charts-tick" x="362.6" y="592">0 %</text>
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<text class="nj-charts-tick nj-charts-tick--l" x="8" y="610">← faster</text>
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<text class="nj-charts-tick nj-charts-tick--r" x="462" y="610">slower →</text>
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<text class="nj-charts-rowlabel" x="8" y="62"><tspan class="nj-charts-code">json_fwd.hpp instead of json.hpp</tspan><tspan class="nj-charts-sub"> · header-only TU</tspan></text>
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<path class="nj-charts-clang" d="M362.6 70 H122.32 Q118.32 70 118.32 74 V78 Q118.32 82 122.32 82 H362.6 Z"><title>json_fwd.hpp instead of json.hpp, header-only TU (Apple clang): −62 %</title></path>
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<text class="nj-charts-val" x="367.6" y="80.5">−62 %</text>
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@@ -46,15 +46,25 @@
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<text class="nj-charts-val" x="367.6" y="340.5">−5 %</text>
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<path class="nj-charts-gcc" d="M362.6 344 H331.14 Q327.14 344 327.14 348 V352 Q327.14 356 331.14 356 H362.6 Z"><title>JSON_HAS_FILESYSTEM=0, model TU (G​CC 16): −9 %</title></path>
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<text class="nj-charts-val" x="367.6" y="354.5">−9 %</text>
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<text class="nj-charts-rowlabel" x="8" y="374"><tspan class="nj-charts-code">JSON_NO_IO</tspan><tspan class="nj-charts-sub"> · model TU*</tspan></text>
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<path class="nj-charts-clang" d="M362.6 382 H358.72 Q354.72 382 354.72 386 V390 Q354.72 394 358.72 394 H362.6 Z"><title>JSON_NO_IO, model TU (Apple clang): −2 %</title></path>
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<text class="nj-charts-val" x="367.6" y="392.5">−2 %</text>
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<path class="nj-charts-gcc" d="M362.6 396 H358.72 Q354.72 396 354.72 400 V404 Q354.72 408 358.72 408 H362.6 Z"><title>JSON_NO_IO, model TU (G​CC 16): −2 %</title></path>
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<text class="nj-charts-val" x="367.6" y="406.5">−2 %</text>
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<text class="nj-charts-rowlabel" x="8" y="426"><tspan class="nj-charts-code">JSON_USE_GLOBAL_UDLS=0</tspan><tspan class="nj-charts-sub"> · model TU*</tspan></text>
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<path class="nj-charts-clang" d="M362.6 434 h0.5 v12 h-0.5 Z"><title>JSON_USE_GLOBAL_UDLS=0, model TU (Apple clang): 0 %</title></path>
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<text class="nj-charts-val" x="367.6" y="444.5">0 %</text>
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<path class="nj-charts-gcc" d="M362.6 448 H362.6 Q358.66 448 358.66 451.94 V456.06 Q358.66 460 362.6 460 H362.6 Z"><title>JSON_USE_GLOBAL_UDLS=0, model TU (G​CC 16): −1 %</title></path>
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<text class="nj-charts-rowlabel" x="8" y="374"><tspan class="nj-charts-code">JSON_HAS_STD_FORMAT=0</tspan><tspan class="nj-charts-sub"> · model TU</tspan></text>
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<path class="nj-charts-clang" d="M362.6 382 H362.6 Q358.66 382 358.66 385.94 V390.06 Q358.66 394 362.6 394 H362.6 Z"><title>JSON_HAS_STD_FORMAT=0, model TU (Apple clang): −1 %</title></path>
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<text class="nj-charts-val" x="367.6" y="392.5">−1 %</text>
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<path class="nj-charts-gcc" d="M362.6 396 H350.84 Q346.84 396 346.84 400 V404 Q346.84 408 350.84 408 H362.6 Z"><title>JSON_HAS_STD_FORMAT=0, model TU (G​CC 16): −4 %</title></path>
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<text class="nj-charts-val" x="367.6" y="406.5">−4 %</text>
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<text class="nj-charts-rowlabel" x="8" y="426"><tspan class="nj-charts-code">JSON_HAS_RANGES=0</tspan><tspan class="nj-charts-sub"> · model TU</tspan></text>
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<path class="nj-charts-clang" d="M362.6 434 H350.84 Q346.84 434 346.84 438 V442 Q346.84 446 350.84 446 H362.6 Z"><title>JSON_HAS_RANGES=0, model TU (Apple clang): −4 %</title></path>
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<text class="nj-charts-val" x="367.6" y="444.5">−4 %</text>
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<path class="nj-charts-gcc" d="M362.6 448 H362.6 Q358.66 448 358.66 451.94 V456.06 Q358.66 460 362.6 460 H362.6 Z"><title>JSON_HAS_RANGES=0, model TU (G​CC 16): −1 %</title></path>
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<text class="nj-charts-val" x="367.6" y="458.5">−1 %</text>
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<line class="nj-charts-zero" x1="362.6" y1="58" x2="362.6" y2="472"/>
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<text class="nj-charts-rowlabel" x="8" y="478"><tspan class="nj-charts-code">JSON_NO_IO</tspan><tspan class="nj-charts-sub"> · model TU*</tspan></text>
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<path class="nj-charts-clang" d="M362.6 486 H358.72 Q354.72 486 354.72 490 V494 Q354.72 498 358.72 498 H362.6 Z"><title>JSON_NO_IO, model TU (Apple clang): −2 %</title></path>
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<text class="nj-charts-val" x="367.6" y="496.5">−2 %</text>
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<path class="nj-charts-gcc" d="M362.6 500 H358.72 Q354.72 500 354.72 504 V508 Q354.72 512 358.72 512 H362.6 Z"><title>JSON_NO_IO, model TU (G​CC 16): −2 %</title></path>
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<text class="nj-charts-val" x="367.6" y="510.5">−2 %</text>
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<text class="nj-charts-rowlabel" x="8" y="530"><tspan class="nj-charts-code">JSON_USE_GLOBAL_UDLS=0</tspan><tspan class="nj-charts-sub"> · model TU*</tspan></text>
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<path class="nj-charts-clang" d="M362.6 538 h0.5 v12 h-0.5 Z"><title>JSON_USE_GLOBAL_UDLS=0, model TU (Apple clang): 0 %</title></path>
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<text class="nj-charts-val" x="367.6" y="548.5">0 %</text>
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<path class="nj-charts-gcc" d="M362.6 552 H362.6 Q358.66 552 358.66 555.94 V560.06 Q358.66 564 362.6 564 H362.6 Z"><title>JSON_USE_GLOBAL_UDLS=0, model TU (G​CC 16): −1 %</title></path>
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<text class="nj-charts-val" x="367.6" y="562.5">−1 %</text>
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<line class="nj-charts-zero" x1="362.6" y1="58" x2="362.6" y2="576"/>
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</svg>
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Before Width: | Height: | Size: 7.5 KiB After Width: | Height: | Size: 9.0 KiB |
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