Docs: compile times of JSON_HAS_STD_FORMAT=0 and JSON_HAS_RANGES=0

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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Niels Lohmann committed 2026-11-05 09:18:04 +01:00
1 parent e48800f09d
commit 3558619847
3 files changed
+126 -24

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@@ -73,6 +73,8 @@ COMPILE = [
("JSON_NO_AUTOMATIC_UDLS", "parsing TU", -1, -2, False),
("JSON_HAS_FILESYSTEM=0 + JSON_NO_IO", "model TU", -8, -11, False),
("JSON_HAS_FILESYSTEM=0", "model TU", -5, -9, False),
("JSON_HAS_STD_FORMAT=0", "model TU", -1, -4, False),
("JSON_HAS_RANGES=0", "model TU", -4, -1, False),
# computed from the ms in "Options without effect on compile times": 1034/1051, 1756/1801, 1055/1051, 1783/1801
("JSON_NO_IO", "model TU", round((1034 / 1051 - 1) * 100), round((1756 / 1801 - 1) * 100), True),
("JSON_USE_GLOBAL_UDLS=0", "model TU", round((1055 / 1051 - 1) * 100), round((1783 / 1801 - 1) * 100), True),