nfx-json 1.5.2
Modern C++20 JSON library with schema validation and generation
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Detailed Description

Benchmarks

Test Environment

Hardware Configuration

Component Specification
Computer Model Lenovo ThinkPad P15v Gen 3
CPU 12th Gen Intel Core i7-12800H (20 logical, 14 physical cores)
Base Clock 2.80 GHz
Turbo Clock 4.80 GHz
L1 Data Cache 48 KiB (×6 P-cores) + 32 KiB (×8 E-cores)
L1 Instruction Cache 32 KiB (×6 P-cores) + 64 KiB (×2 E-core clusters)
L2 Unified Cache 1.25 MiB (×6 P-cores) + 2 MiB (×2 E-core clusters)
L3 Unified Cache 24 MiB (×1 shared)
RAM DDR4-3200 (32GB)
GPU NVIDIA RTX A2000 4GB GDDR6

Software Configuration

Platform OS Benchmark Framework C++ Compiler nfx-json version
Linux LMDE 7 Google Benchmark v1.9.5 Clang 19.1.7-x64 1.2.0
Windows Windows 10 Google Benchmark v1.9.5 MinGW GCC 14.2.0-x64 1.2.0
Windows Windows 10 Google Benchmark v1.9.5 MSVC 19.50.35721-x64 1.2.0

Performance Results

JSON Access

Value Retrieval

Operation Linux Clang Windows MinGW GCC Windows MSVC
Get by Key (Top Level) 2.29 ns 2.49 ns 1.59 ns
Get by Key (Nested) 5.70 ns 6.51 ns 16.3 ns
Get by Pointer (Top) 20.5 ns 21.6 ns 28.0 ns
Get by Pointer (Nested) 42.5 ns 48.5 ns 61.6 ns
Get Deep Nested (3 Lvl) 11.8 ns 13.6 ns 24.8 ns
Get Deep Nested (4 Lvl) 16.8 ns 18.7 ns 36.6 ns
Has Field (Exists) 16.5 ns 17.4 ns 31.8 ns
Has Field (Not Exists) 24.9 ns 26.4 ns 40.7 ns
Has Field (Nested) 81.8 ns 98.6 ns 118 ns

JSON Iteration

Container Traversal

Operation Linux Clang Windows MinGW GCC Windows MSVC
Object Field Iteration 61.9 ns 86.7 ns 62.2 ns
Array Element Iteration 37.9 ns 36.3 ns 61.8 ns
Nested Object Iteration 2713 ns 5484 ns 6111 ns

JSON Modification

Document Mutation

Operation Linux Clang Windows MinGW GCC Windows MSVC
Set Primitive (String) 60.3 ns 92.8 ns 94.2 ns
Set Primitive (Int) 51.2 ns 82.0 ns 87.4 ns
Set Primitive (Bool) 51.4 ns 86.4 ns 88.5 ns
Set Primitive (Double) 50.8 ns 89.9 ns 88.6 ns
Set Nested (2 Levels) 107 ns 179 ns 189 ns
Set Nested (3 Levels) 151 ns 270 ns 274 ns
Set Nested (4 Levels) 197 ns 373 ns 358 ns
Add Object Field (Seq) 456 ns 636 ns 761 ns
Append Array Element 505 ns 1034 ns 1056 ns
Append to Large Array 4597 ns 8838 ns 8722 ns

JSON Parsing

Parse from String

Operation Linux Clang Windows MinGW GCC Windows MSVC
Parse Small Object 212 ns 373 ns 392 ns
Parse Medium Object 1031 ns 1640 ns 2122 ns
Parse Large Object 3552 ns 5179 ns 7386 ns
Parse Nested Objects 475 ns 862 ns 913 ns
Parse Small Array 131 ns 211 ns 315 ns
Parse Large Array 2592 ns 4201 ns 4736 ns
Parse Mixed Types 782 ns 1179 ns 1624 ns

Schema Generation

SchemaGenerator Performance

Operation Linux Clang Windows MinGW GCC Windows MSVC
Generate from Small Doc 1.92 us 3.25 us 3.34 us
Generate from Large Doc 8.41 us 15.3 us 15.2 us
Generate from 10 Docs 20.8 us 35.5 us 38.2 us
Generate from 100 Docs 195 us 327 us 361 us
Format Inference 4.30 us 6.85 us 7.24 us
Constraint Inference 101 us 163 us 222 us

Schema Validation

SchemaValidator Performance

Operation Linux Clang Windows MinGW GCC Windows MSVC
Validate Simple Schema 2.61 us 3.93 us 3.91 us
Validate Complex Schema 5.64 us 8.65 us 8.87 us
Validate with $ref 3.14 us 4.71 us 4.85 us
Validate String Formats 3.79 us 5.85 us 6.08 us
Validate with Errors 2.66 us 4.28 us 4.20 us
Validate Deeply Nested 0.868 us 2.19 us 1.40 us

JSON Serialization

Write to String

Operation Linux Clang Windows MinGW GCC Windows MSVC
SerializeSmallObject 427 ns 602 ns 574 ns
SerializeSmallObject_Builder 78.2 ns 121 ns 119 ns
SerializeMediumObject 1123 ns 1832 ns 1835 ns
SerializeMediumObject_Builder 264 ns 390 ns 359 ns
SerializeLargeObject 50043 ns 72044 ns 64755 ns
SerializeLargeObject_Builder 3851 ns 5389 ns 6820 ns
SerializeSmallArray 700 ns 1362 ns 1419 ns
SerializeSmallArray_Builder 40.6 ns 62.3 ns 112 ns
SerializeLargeArray 60191 ns 118401 ns 103034 ns
SerializeLargeArray_Builder 3572 ns 3606 ns 9602 ns
SerializeNested 382 ns 741 ns 767 ns
SerializeNested_Builder 137 ns 206 ns 180 ns
SerializeStringHeavy 892 ns 1482 ns 1535 ns
SerializeStringHeavy_Builder 131 ns 198 ns 181 ns

Write to String (Pretty Print, indent=2)

Operation Linux Clang Windows MinGW GCC Windows MSVC
SerializeSmallObject_Pretty 380 ns 596 ns 586 ns
SerializeSmallObject_Pretty_Builder 84.7 ns 137 ns 134 ns
SerializeMediumObject_Pretty 1215 ns 1816 ns 1883 ns
SerializeMediumObject_Pretty_Builder 376 ns 627 ns 531 ns
SerializeLargeObject_Pretty 54424 ns 73290 ns 74986 ns
SerializeLargeObject_Pretty_Builder 4090 ns 6043 ns 10254 ns

Round-Trip (Parse + Serialize)

Operation Linux Clang Windows MinGW GCC Windows MSVC
Small Object 366 ns 647 ns 1004 ns
Large Array (1K) 27742 ns 37830 ns 51618 ns

Unique Items

Array Uniqueness Check

Operation Linux Clang Windows MinGW GCC Windows MSVC
Unique Integers (10) 0.848 us 1.23 us 1.27 us
Unique Integers (100) 4.23 us 5.09 us 5.86 us
Unique Integers (500) 25.9 us 22.3 us 25.2 us
Unique Integers (1000) 65.2 us 45.8 us 51.2 us
Unique Integers (5000) 121 us 113 us 122 us
Unique Strings (100) 7.08 us 10.2 us 8.39 us
Unique Strings (1000) 93.9 us 102 us 92.9 us
Unique Objects (100) 44.8 us 71.7 us 75.0 us
Unique Objects (1000) 396 us 596 us 629 us
Unique Mixed (100) 2.92 us 5.33 us 3.75 us
Unique Mixed (1000) 16.9 us 23.2 us 25.7 us
Unique Duplicate at End (100) 4.43 us 5.66 us 6.17 us
Unique Duplicate at End (1000) 42.7 us 46.5 us 53.6 us
Unique Duplicate at End (5000) 121 us 117 us 122 us

Updated on February 04, 2026