Niels Lohmann eed5792dbd json_view: no per-object allocations in ordered_json comparisons ...

For an object type that keeps the order of its members (ordered_json),
resolve_indices() allocated a vector per compared object, and
resolve_members() two. They now use one working vector owned by equal(),
whose capacity is reused, and resolve_indices() needs none when the keys
are unique. resolve_members() sorts small objects by insertion, as the
other paths do.

Instructions per comparison (callgrind, GCC 13 and clang 18, x86-64):
twitter, ordered_json view == ordered_json: 0.939 / 0.941; 20000 small
objects with a duplicate key: 0.741-0.768; all other rows (json,
citm_catalog, canada, view == view) within 0.988-1.003.

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

2026-10-25 21:56:14 +01:00

..

conversions

from_json: number-first dispatch for arithmetic types, loop for std::array (#5902)

2026-10-25 06:17:51 +01:00

input

Fix VS 2015 build of the DOM parser (#5882) (#5916)

2026-10-25 12:08:58 +01:00

iterators

Consolidate duplicated detail helpers and bodies (#5891) (#5901)

2026-10-25 06:17:50 +01:00

meta

Use standard library helpers where available, with C++11 fallbacks (#5876)

2026-10-21 20:14:59 +02:00

output

Consolidate duplicated detail helpers and bodies (#5891) (#5901)

2026-10-25 06:17:50 +01:00

view

json_view: no per-object allocations in ordered_json comparisons

2026-10-25 21:56:14 +01:00

abi_config.hpp

Add json_document and json_view: node index, parser, and document (#5620)

2026-10-21 10:21:27 +02:00

abi_macros.hpp

Scan strings with SSE2, SSSE3, or NEON (#5853)

2026-10-21 20:00:50 +02:00

bit_ops.hpp

Use standard library helpers where available, with C++11 fallbacks (#5876)

2026-10-21 20:14:59 +02:00

exceptions.hpp

Consolidate duplicated detail helpers and bodies (#5891) (#5901)

2026-10-25 06:17:50 +01:00

hash.hpp

Make std::hash<basic_json> consistent with operator== for numbers (#5772)

2026-10-07 19:18:51 +02:00

json_custom_base_class.hpp

Fix ADL leak of nlohmann::detail through basic_json's default base class (#5238)

2026-07-06 12:47:24 +02:00

json_pointer.hpp

Consolidate duplicated detail helpers and bodies (#5891) (#5901)

2026-10-25 06:17:50 +01:00

json_ref.hpp

Copy a pair-shaped array value under JSON_BRACE_INIT_COPY_SEMANTICS (#5701)

2026-10-07 07:39:05 +02:00

macro_scope.hpp

Silence macro-to-enum for the endianness macros (#5881)

2026-10-22 08:40:05 +02:00

macro_unscope.hpp

Use standard library helpers where available, with C++11 fallbacks (#5876)

2026-10-21 20:14:59 +02:00

recursion_depth_limit.hpp

Share one nesting depth limit between all bounded descents (#5637)

2026-09-30 20:06:43 +02:00

string_concat.hpp

Deduplicate basic_json internals; make insert(pos, json&&) move (#5727)

2026-10-04 11:57:41 +02:00

string_escape.hpp

Fix compiler warnings on develop from the API performance stack (#5858)

2026-10-15 22:42:46 +02:00

string_utils.hpp

Consolidate duplicated detail helpers and bodies (#5891) (#5901)

2026-10-25 06:17:50 +01:00

value_t.hpp

Consolidate duplicated detail helpers and bodies (#5891) (#5901)

2026-10-25 06:17:50 +01:00