Niels Lohmann f930ed5f71 Write the path of an array element in flatten() with a single resize ...

Replacing the path of the previous child by "/<index>" took a resize, a
push_back and an append. For array elements the path is now resized once
to its final length and the slash and the digits are written into it.
Object keys keep the three calls: a version that also wrote them directly
made flatten() of twitter 4 % slower in cycles at equal instructions.

flatten() (instructions on macOS, Linux Ir GCC 13 / Clang 18): canada 172.1M ->
164.7M, 123.8M -> 120.6M / 121.2M -> 118.9M; citm_catalog 40.4M -> 39.5M, 30.1M
-> 29.6M / 30.0M -> 29.6M; twitter unchanged.

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

2026-10-22 09:29:56 +02:00

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nlohmann

Write the path of an array element in flatten() with a single resize

2026-10-22 09:29:56 +02:00