Detailed Description

Benchmarks

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

Platform	OS	Benchmark Framework	C++ Compiler	nfx-stringbuilder Version
Linux	LMDE 7	Google Benchmark v1.9.4	GCC 14.2.0-x64	v0.1.0
Linux	LMDE 7	Google Benchmark v1.9.4	Clang 19.1.7-x64	v0.1.0
Windows	Windows 10	Google Benchmark v1.9.4	MinGW GCC 14.2.0-x64	v0.1.0
Windows	Windows 10	Google Benchmark v1.9.4	Clang-GNU-CLI 19.1.5-x64	v0.1.0
Windows	Windows 10	Google Benchmark v1.9.4	Clang-MSVC-CLI 19.1.5-x64	v0.1.0
Windows	Windows 10	Google Benchmark v1.9.4	MSVC 19.44.35217.0-x64	v0.1.0

String Concatenation Benchmarks

Small Strings

Operation	Linux GCC	Linux Clang	Windows MinGW GCC	Windows Clang-GNU-CLI	Windows Clang-MSVC-CLI	Windows MSVC
BM_StdString_SmallStrings	27.6 ns	26.6 ns	49.2 ns	47.5 ns	45.3 ns	54.8 ns
BM_StringStream_SmallStrings	143 ns	136 ns	198 ns	346 ns	335 ns	412 ns
BM_StringBuilder_SmallStrings	42.1 ns	36.7 ns	85.4 ns	56.1 ns	56.3 ns	69.3 ns

Medium Strings

Operation	Linux GCC	Linux Clang	Windows MinGW GCC	Windows Clang-GNU-CLI	Windows Clang-MSVC-CLI	Windows MSVC
BM_StdString_MediumStrings	55.3 ns	55.9 ns	139 ns	143 ns	145 ns	1019 ns
BM_StringStream_MediumStrings	161 ns	159 ns	221 ns	540 ns	554 ns	1568 ns
BM_StringBuilder_MediumStrings	64.1 ns	55.6 ns	110 ns	86.6 ns	90.8 ns	99.9 ns

Large Strings

Operation	Linux GCC	Linux Clang	Windows MinGW GCC	Windows Clang-GNU-CLI	Windows Clang-MSVC-CLI	Windows MSVC
BM_StdString_LargeStrings	68.1 ns	68.4 ns	118 ns	113 ns	119 ns	122 ns
BM_StringStream_LargeStrings	186 ns	176 ns	301 ns	594 ns	606 ns	1657 ns
BM_StringBuilder_LargeStrings	57.1 ns	48.1 ns	108 ns	77.2 ns	79.9 ns	87.9 ns

Pool Efficiency Benchmarks

Operation	Linux GCC	Linux Clang	Windows MinGW GCC	Windows Clang-GNU-CLI	Windows Clang-MSVC-CLI	Windows MSVC
BM_StdString_RapidCycles	121 ns	112 ns	425 ns	410 ns	406 ns	453 ns
BM_StringBuilder_PoolEfficiency	427 ns	359 ns	967 ns	650 ns	672 ns	758 ns
BM_StringBuilder_BufferReuse	731 ns	541 ns	1004 ns	939 ns	943 ns	5213 ns
BM_StringBuilder_ZeroAlloc	59.8 ns	50.3 ns	90.5 ns	54.6 ns	60.0 ns	68.4 ns

Mixed Operations Benchmarks

Operation	Linux GCC	Linux Clang	Windows MinGW GCC	Windows Clang-GNU-CLI	Windows Clang-MSVC-CLI	Windows MSVC
BM_StdString_MixedOperations	73.9 ns	72.4 ns	161 ns	203 ns	201 ns	222 ns
BM_StringStream_MixedOperations	361 ns	343 ns	425 ns	1233 ns	1250 ns	2459 ns
BM_StringBuilder_MixedOperations	215 ns	173 ns	276 ns	253 ns	256 ns	272 ns
BM_StringBuilder_MemoryPressure	1771 ns	1605 ns	2881 ns	2698 ns	2751 ns	2844 ns

Operation	Linux GCC	Linux Clang	Windows MinGW GCC	Windows Clang-GNU-CLI	Windows Clang-MSVC-CLI	Windows MSVC
BM_StringBuilder_NoHint	1999 ns	1693 ns	2599 ns	2499 ns	2568 ns	2803 ns
BM_StringBuilder_WithHint	1679 ns	1410 ns	2088 ns	2063 ns	2076 ns	2311 ns

format() Method Benchmarks

Operation	Linux GCC	Linux Clang	Windows MinGW GCC	Windows Clang-GNU-CLI	Windows Clang-MSVC-CLI	Windows MSVC
BM_StdFormat_ComplexFormatting	1879 ns	1733 ns	2886 ns	2397 ns	2483 ns	2936 ns
BM_StringBuilder_FormatMethod	2381 ns	2311 ns	2858 ns	2551 ns	2505 ns	2874 ns
BM_StringBuilder_ManualFormatting	1974 ns	1829 ns	3401 ns	3430 ns	3434 ns	3619 ns

Updated on November 23, 2025