nfx-stringbuilderpool 1.0.0
High-performance C++20 library for zero-allocation string building with thread-safe pooling
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Benchmarks

Test Environment

Hardware Configuration

Component Specification
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 Benchmark Framework C++ Compiler nfx-stringbuilderpool Version
Linux Google Benchmark v1.9.4 GCC 14.2.0-x64 v1.0.0
Linux Google Benchmark v1.9.4 Clang 19.1.7-x64 v1.0.0
Windows Google Benchmark v1.9.4 MinGW GCC 14.2.0-x64 v1.0.0
Windows Google Benchmark v1.9.4 Clang-GNU-CLI 19.1.5-x64 v1.0.0
Windows Google Benchmark v1.9.4 Clang-MSVC-CLI 19.1.5-x64 v1.0.0
Windows Google Benchmark v1.9.4 MSVC 19.44.35217.0-x64 v1.0.0

Performance Results

String Building Benchmarks

Operation Linux GCC Linux Clang Windows MinGW GCC Windows Clang-GNU-CLI Windows Clang-MSVC-CLI Windows MSVC
BM_StdString_SmallStrings 29.2 ns 34.6 ns 60.6 ns 92.3 ns 76.0 ns 57.9 ns
BM_StringStream_SmallStrings 155 ns 170 ns 238 ns 688 ns 565 ns 415 ns
BM_StringBuilderPool_SmallStrings 46.4 ns 42.4 ns 100 ns 117 ns 92.6 ns 67.0 ns
BM_StdString_MediumStrings 68.7 ns 74.1 ns 173 ns 293 ns 226 ns 158 ns
BM_StringStream_MediumStrings 184 ns 204 ns 281 ns 1138 ns 875 ns 709 ns
BM_StringBuilderPool_MediumStrings 72.8 ns 70.8 ns 130 ns 179 ns 137 ns 104 ns
BM_StdString_LargeStrings 71.0 ns 82.4 ns 143 ns 227 ns 168 ns 131 ns
BM_StringStream_LargeStrings 209 ns 249 ns 362 ns 1228 ns 911 ns 775 ns
BM_StringBuilderPool_LargeStrings 65.7 ns 64.5 ns 123 ns 165 ns 118 ns 99.8 ns
BM_StdString_RapidCycles 156 ns 182 ns 452 ns 823 ns 587 ns 488 ns
BM_StringBuilderPool_PoolEfficiency 486 ns 488 ns 1094 ns 1313 ns 1007 ns 754 ns
BM_StdString_MixedOperations 78.5 ns 101 ns 168 ns 403 ns 275 ns 227 ns
BM_StringStream_MixedOperations 431 ns 506 ns 516 ns 2533 ns 1746 ns 1638 ns
BM_StringBuilderPool_MixedOperations 230 ns 220 ns 330 ns 517 ns 350 ns 278 ns
BM_StringBuilderPool_BufferReuse 808 ns 714 ns 1271 ns 1913 ns 1306 ns 1034 ns
BM_StringBuilderPool_ZeroAlloc 62.4 ns 58.8 ns 110 ns 110 ns 77.9 ns 70.6 ns
BM_StringBuilderPool_MemoryPressure 1728 ns 1773 ns 3567 ns 5817 ns 3843 ns 2936 ns

Benchmarks executed on October 31, 2025