Niels Lohmann 731363a325 Write the usual indentation with four stores instead of memset ...

Every line of a pretty-printed document starts with its indentation, which
was written by calling memset with a length known only at run time.

An indentation of up to 32 characters, with room in the write buffer,
stores four words of the indentation character and claims the part it
needs. Wider indentations and a nearly full buffer take the unchanged
path.

Apple M1, Apple clang, retired instructions per dump(4), on top of the
previous changes:
  canada  50.7M -> 44.4M (-13 %)   citm_catalog 8.85M -> 7.48M (-16 %)
  twitter 5.13M -> 4.71M (-8 %)    jeopardy 564M -> 518M (-8 %)
  a 139-byte object 3277 -> 2924 (-11 %)
Linux x86-64 (callgrind), the whole series against develop, gcc 13 / clang 18:
  canada, indent 4: -13 % / -14 %.

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

2026-10-22 09:28:21 +02:00

..

conversions

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

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

input

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

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

iterators

Fix CI failures on develop from the API performance stack (#5860)

2026-10-16 19:16:21 +02:00

meta

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

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

output

Write the usual indentation with four stores instead of memset

2026-10-22 09:28:21 +02:00

view

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

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

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

Fix CI failures on develop from the API performance stack (#5860)

2026-10-16 19:16:21 +02:00

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

Speed up flatten(), unflatten(), diff() and patch() (#5861)

2026-10-21 21:27:33 +02:00

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

Write short plain strings and keys in one go in dump()

2026-10-22 09:28:11 +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

Make UTF8_ACCEPT/UTF8_REJECT inline variables to avoid TU-local exposure in modules (#5797)

2026-10-09 23:38:42 +02:00

value_t.hpp

Fix silent wrong results for custom number types (#5805)

2026-10-21 08:36:31 +00:00