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

..

json_fwd.hpp

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

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

json_literals.hpp

Move the user-defined string literals to <nlohmann/json_literals.hpp> and add JSON_NO_AUTOMATIC_UDLS (#5610)

2026-09-30 20:08:17 +02:00

json_view.hpp

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

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

json.hpp

Write the usual indentation with four stores instead of memset

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