Niels Lohmann 4cad4e08a4 Replace snprintf with a branch-free writer for \uXXXX escapes ...

dump_escaped called std::snprintf(..., "\u%04x", ...) once per escaped
code point in the string serialization hot path. snprintf re-parses
the format string and pulls in locale/printf machinery on every call,
which is far heavier than the fixed 6-/12-byte output warrants. This
is hot for any string containing control characters, and for all
non-ASCII text when ensure_ascii is set.

Replace it with write_u_escape, a small helper that writes the escape
directly into string_buffer via a nibble-to-hex lookup table, mirroring
the existing hand-rolled dump_integer fast path in the same file.

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

2026-07-06 08:33:47 +02:00

..

fuzzer-driver_afl.cpp

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fuzzer-parse_bjdata.cpp

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fuzzer-parse_bson.cpp

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fuzzer-parse_cbor.cpp

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fuzzer-parse_json.cpp

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fuzzer-parse_msgpack.cpp

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fuzzer-parse_ubjson.cpp

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make_test_data_available.hpp

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test_utils.hpp

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unit-32bit.cpp

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unit-algorithms.cpp

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unit-allocator.cpp

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unit-alt-string.cpp

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unit-assert_macro.cpp

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unit-binary_formats.cpp

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unit-bjdata.cpp

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unit-bson.cpp

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unit-byte_container_with_subtype.cpp

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unit-capacity.cpp

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unit-cbor.cpp

fix(cbor): reject overflowing negative integers (#5039)

2026-01-12 10:17:47 +01:00

unit-class_const_iterator.cpp

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unit-class_iterator.cpp

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unit-class_lexer.cpp

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unit-class_parser_diagnostic_positions.cpp

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unit-class_parser.cpp

Remove nullptr safety check from sax_parse functions (#5139)

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unit-comparison.cpp

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unit-concepts.cpp

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unit-constructor1.cpp

Reference tuple from json (#5016)

2026-01-23 08:14:55 +01:00

unit-constructor2.cpp

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unit-convenience.cpp

Replace snprintf with a branch-free writer for \uXXXX escapes

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unit-conversions.cpp

optional: use #if instead of #ifndef in test, fixes #3859 (#5183)

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unit-custom-base-class.cpp

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unit-deserialization.cpp

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unit-diagnostic-positions-only.cpp

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unit-diagnostic-positions.cpp

🚷 avoid assertion in patch (#5222)

2026-07-01 06:47:24 +02:00

unit-diagnostics.cpp

Fix: update() parent pointers not updated after recursive merge with JSON_DIAGNOSTICS (#5187)

2026-05-22 14:14:11 +02:00

unit-disabled_exceptions.cpp

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unit-element_access1.cpp

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unit-element_access2.cpp

Extend value to arrays when using JSON pointers (#5223)

2026-07-02 06:35:35 +02:00

unit-format-as.cpp

Add std::format and fmt support (#5224)

2026-07-02 15:59:36 +02:00

unit-hash.cpp

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unit-inspection.cpp

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unit-items.cpp

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unit-iterators1.cpp

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unit-iterators2.cpp

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unit-iterators3.cpp

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unit-json_patch.cpp

🚷 avoid assertion in patch (#5222)

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unit-json_pointer.cpp

Add front methods to json_pointers (implements #4889) (#5152)

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unit-large_json.cpp

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unit-locale-cpp.cpp

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unit-merge_patch.cpp

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unit-meta.cpp

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unit-modifiers.cpp

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unit-msgpack.cpp

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unit-no-mem-leak-on-adl-serialize.cpp

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unit-noexcept.cpp

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unit-ordered_json.cpp

🎓 fix warning (#5169)

2026-05-14 15:39:18 +02:00

unit-ordered_map.cpp

Add missing overload to ordered_map::find (#5171)

2026-05-18 20:33:47 +02:00

unit-pointer_access.cpp

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unit-readme.cpp

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unit-reference_access.cpp

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unit-regression1.cpp

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unit-regression2.cpp

Fix ambiguous static_cast (#5221)

2026-07-02 17:13:04 +02:00

unit-serialization.cpp

Document number conversion (#5208)

2026-06-16 22:05:44 +02:00

unit-std-format.cpp

Add std::format and fmt support (#5224)

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unit-testsuites.cpp

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unit-to_chars.cpp

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unit-type_traits.cpp

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unit-ubjson.cpp

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unit-udl.cpp

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unit-udt_macro.cpp

New macros for the named JSON convertor generation (#4563)

2026-05-16 10:04:22 +02:00

unit-udt.cpp

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unit-unicode1.cpp

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unit-unicode2.cpp

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unit-unicode3.cpp

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unit-unicode4.cpp

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unit-unicode5.cpp

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unit-user_defined_input.cpp

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unit-windows_h.cpp

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unit-wstring.cpp

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unit.cpp

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