json/include/nlohmann/detail at e59b455616438f2a7ca4e053a9c80c4b1c94033d - json

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Niels Lohmann e29ac4f043 Reserve capacity in from_json() object conversion when supported

The object-to-container from_json() overload filled the target
container one element at a time without reserving capacity, even
when the target type supports reserve() (e.g. std::unordered_map)
and the number of elements is already known. This caused unnecessary
rehashing while parsing large objects into such containers.

Add a reserve-detecting overload (from_json_object_impl), mirroring
the priority_tag-based SFINAE technique already used by the array
conversion path (from_json_array_impl), so that reserve(size()) is
called up front when available and the loop falls back unchanged
otherwise (e.g. for std::map).

Fixes #5406

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

2026-09-05 20:43:23 +02:00

conversions

Reserve capacity in from_json() object conversion when supported

2026-09-05 20:43:23 +02:00

input

Fix CBOR tag handlers not recognizing tags 0-5 and 21-23 (#5331 )

2026-08-19 20:19:47 +02:00

iterators

docs: add IDs to @requirement tags to fix Doxygen autolinking (#5162 )

2026-05-10 11:37:41 +02:00