json/tests at 49ea9189692890cd3bd1474dbf301deaa7480fcc - json

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Niels Lohmann 49ea918969 Unflatten in time and memory linear in the pointer depth

#5443 made unflatten() decide between arrays and objects independently
of the iteration order by collecting the pointer prefixes that have a
reference token 0 below them in a std::set<std::vector<string_t>>.
Every such prefix was stored as a copy of all its reference tokens, and
get_and_create() compared whole prefix vectors at every step, so
unflattening a pointer of depth d took time and memory quadratic in d:
a 10,000-level array pointer took 18 s and 1.3 GB, a 100,000-level one
did not finish.

The prefixes are now numbered nodes of a tree, so each is stored once
and get_and_create() follows the tree token by token. The result is
unchanged, including its independence of the iteration order.

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

2026-10-09 09:49:05 +02:00

abi

Store maps with enum keys as objects (opt-in) (#5600 )

2026-10-04 17:54:05 +02:00

benchmarks

Move instead of deep-copy ordered_json values when an object grows (#5609 )

2026-09-30 20:06:34 +02:00

cmake_add_subdirectory

Remove test debt: dead guards, discarded results, and unreferenced files (#5732 )

2026-10-01 07:33:07 +02:00

cmake_fetch_content

Remove test debt: dead guards, discarded results, and unreferenced files (#5732 )