nfx-stringbuilder

Benchmarks

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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-stringbuilder version
Linux	LMDE 7	Google Benchmark v1.9.4	GCC 14.2.0-x64	v0.4.0
Linux	LMDE 7	Google Benchmark v1.9.4	Clang 19.1.7-x64	v0.4.0
Windows	Windows 10	Google Benchmark v1.9.4	MinGW GCC 14.2.0-x64	v0.4.0
Windows	Windows 10	Google Benchmark v1.9.4	Clang-GNU-CLI 19.1.5-x64	v0.4.0
Windows	Windows 10	Google Benchmark v1.9.4	Clang-MSVC-CLI 19.1.5-x64	v0.4.0
Windows	Windows 10	Google Benchmark v1.9.4	MSVC 19.44.35217.0-x64	v0.4.0

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Performance Results

Small strings

Operation	Linux GCC	Linux Clang	Windows MinGW GCC	Windows Clang-GNU-CLI	Windows Clang-MSVC-CLI	Windows MSVC
BM_StdString_SmallStrings	48.6 ns	55.0 ns	134 ns	128 ns	111 ns	99.3 ns
BM_StringStream_SmallStrings	214 ns	240 ns	374 ns	745 ns	711 ns	738 ns
BM_FmtMemoryBuffer_SmallStrings	83.4 ns	91.0 ns	163 ns	177 ns	160 ns	120 ns
BM_Abseil_SmallStrings	88.8 ns	103 ns	190 ns	158 ns	143 ns	112 ns
BM_StringBuilder_SmallStrings	54.4 ns	60.6 ns	107 ns	105 ns	86 ns	76.3 ns

Medium Strings

Operation	Linux GCC	Linux Clang	Windows MinGW GCC	Windows Clang-GNU-CLI	Windows Clang-MSVC-CLI	Windows MSVC
BM_StdString_MediumStrings	70.8 ns	80.9 ns	217 ns	211 ns	197 ns	1054 ns
BM_StringStream_MediumStrings	194 ns	208 ns	329 ns	838 ns	837 ns	1733 ns
BM_FmtMemoryBuffer_MediumStrings	71.2 ns	82.6 ns	139 ns	157 ns	141 ns	109 ns
BM_Abseil_MediumStrings	109 ns	116 ns	263 ns	262 ns	268 ns	1082 ns
BM_StringBuilder_MediumStrings	54.6 ns	57.0 ns	141 ns	108 ns	100 ns	81.1 ns

Large Strings

Operation	Linux GCC	Linux Clang	Windows MinGW GCC	Windows Clang-GNU-CLI	Windows Clang-MSVC-CLI	Windows MSVC
BM_StdString_LargeStrings	80.5 ns	88.8 ns	175 ns	165 ns	154 ns	122 ns
BM_StringStream_LargeStrings	220 ns	236 ns	422 ns	893 ns	854 ns	1804 ns
BM_FmtMemoryBuffer_LargeStrings	77.5 ns	89.7 ns	190 ns	188 ns	184 ns	134 ns
BM_Abseil_LargeStrings	113 ns	118 ns	243 ns	182 ns	188 ns	143 ns
BM_StringBuilder_LargeStrings	88.5 ns	93.4 ns	220 ns	230 ns	215 ns	165 ns

Huge Strings

Operation	Linux GCC	Linux Clang	Windows MinGW GCC	Windows Clang-GNU-CLI	Windows Clang-MSVC-CLI	Windows MSVC
BM_StdString_HugeStrings	299 ns	305 ns	800 ns	584 ns	558 ns	422 ns
BM_StringStream_HugeStrings	669 ns	701 ns	1735 ns	1974 ns	1904 ns	2791 ns
BM_FmtMemoryBuffer_HugeStrings	621 ns	601 ns	1466 ns	1435 ns	1381 ns	967 ns
BM_Abseil_HugeStrings	342 ns	355 ns	772 ns	692 ns	698 ns	499 ns
BM_StringBuilder_HugeStrings	619 ns	627 ns	1804 ns	1699 ns	1573 ns	1184 ns

Rapid Allocation Cycles

Operation	Linux GCC	Linux Clang	Windows MinGW GCC	Windows Clang-GNU-CLI	Windows Clang-MSVC-CLI	Windows MSVC
BM_StdString_RapidCycles	199 ns	213 ns	540 ns	549 ns	544 ns	469 ns
BM_FmtMemoryBuffer_RapidCycles	406 ns	443 ns	812 ns	850 ns	837 ns	755 ns
BM_Abseil_RapidCycles	343 ns	340 ns	716 ns	608 ns	614 ns	509 ns
BM_StringBuilder_RapidCycles	335 ns	310 ns	670 ns	661 ns	656 ns	571 ns

Mixed Operations

Operation	Linux GCC	Linux Clang	Windows MinGW GCC	Windows Clang-GNU-CLI	Windows Clang-MSVC-CLI	Windows MSVC
BM_StdString_MixedOperations	90.2 ns	88.0 ns	211 ns	214 ns	215 ns	187 ns
BM_StringStream_MixedOperations	496 ns	496 ns	642 ns	2360 ns	2616 ns	3567 ns
BM_FmtMemoryBuffer_MixedOperations	210 ns	204 ns	290 ns	280 ns	328 ns	274 ns
BM_Abseil_MixedOperations	309 ns	298 ns	518 ns	419 ns	439 ns	379 ns
BM_StringBuilder_MixedOperations	165 ns	158 ns	240 ns	225 ns	218 ns	191 ns

Capacity Hints

Operation	Linux GCC	Linux Clang	Windows MinGW GCC	Windows Clang-GNU-CLI	Windows Clang-MSVC-CLI	Windows MSVC
BM_StringBuilder_NoHint	1533 ns	1519 ns	2118 ns	2177 ns	1950 ns	1685 ns
BM_StringBuilder_WithHint	1539 ns	1336 ns	1965 ns	1784 ns	1765 ns	1476 ns

Formatting

Operation	Linux GCC	Linux Clang	Windows MinGW GCC	Windows Clang-GNU-CLI	Windows Clang-MSVC-CLI	Windows MSVC
BM_StdFormat_ComplexFormatting	2129 ns	1981 ns	3761 ns	2995 ns	3369 ns	3035 ns
BM_FmtFormat_ComplexFormatting	1310 ns	1455 ns	2292 ns	2554 ns	2727 ns	2380 ns
BM_Abseil_ComplexFormatting	2256 ns	2008 ns	3941 ns	2983 ns	3449 ns	3081 ns
BM_StringBuilder_WithFormat	2221 ns	1952 ns	3471 ns	1688 ns	3209 ns	2886 ns
BM_StringBuilder_ManualFormatting	599 ns	579 ns	1619 ns	698 ns	732 ns	698 ns

Advanced

Operation	Linux GCC	Linux Clang	Windows MinGW GCC	Windows Clang-GNU-CLI	Windows Clang-MSVC-CLI	Windows MSVC
BM_StringBuilder_BufferReuse	525 ns	516 ns	497 ns	607 ns	628 ns	537 ns
BM_StringBuilder_ZeroAlloc	44.8 ns	44.2 ns	49.6 ns	45.0 ns	47 ns	59.8 ns
BM_StringBuilder_MemoryPressure	1304 ns	1335 ns	2845 ns	2561 ns	2727 ns	2113 ns

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Updated on December 18, 2025

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