nfx-hashing 0.1.2
Modern C++20 header-only hashing library with hardware acceleration
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benchmark Directory Reference

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-hashing 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

Performance Results

String Hashing Operations

Low-level hash building block

Operation Linux GCC Linux Clang Windows MinGW GCC Windows Clang-GNU-CLI Windows Clang-MSVC-CLI Windows MSVC
FNV1a (single byte) 0.838 ns 1.06 ns 0.849 ns 1.35 ns 1.49 ns 1.25 ns
CRC32C (single byte) 0.629 ns 0.645 ns 0.632 ns 0.837 ns 0.907 ns 1.09 ns
CRC32C SW (single) 5.12 ns 5.77 ns 5.21 ns 7.61 ns 8.44 ns 14.4 ns
Larson (single byte) 1.05 ns 1.06 ns 1.05 ns 1.55 ns 1.72 ns 2.13 ns
Seed mix (32-bit) 2.31 ns 2.33 ns 2.44 ns 3.69 ns 3.85 ns 4.59 ns
FNV1a64 (single byte) 0.839 ns 1.06 ns 0.837 ns 1.40 ns 1.26 ns 1.41 ns
Larson64 (single) 1.05 ns 1.07 ns 1.06 ns 1.34 ns 1.22 ns 1.37 ns
Seed mix (64-bit) 3.56 ns 3.60 ns 3.58 ns 4.45 ns 3.99 ns 5.77 ns

String hashing (32-bit)

Operation Linux GCC Linux Clang Windows MinGW GCC Windows Clang-GNU-CLI Windows Clang-MSVC-CLI Windows MSVC
Hash short (5 chars) 208 ns 195 ns 221 ns 344 ns 348 ns 433 ns
Hash medium (30 chars) 453 ns 378 ns 474 ns 593 ns 632 ns 993 ns
Hash long (1000 chars) 4837 ns 3638 ns 5052 ns 5781 ns 6042 ns 10463 ns
ByteByByte FNV1a short 194 ns 192 ns 207 ns 490 ns 510 ns 423 ns
ByteByByte FNV1a medium 591 ns 526 ns 614 ns 830 ns 872 ns 1256 ns
ByteByByte FNV1a long 7334 ns 6959 ns 7533 ns 10882 ns 11347 ns 15276 ns
ByteByByte CRC32C short 188 ns 184 ns 220 ns 361 ns 361 ns 446 ns
ByteByByte CRC32C medium 473 ns 380 ns 465 ns 609 ns 625 ns 1011 ns
ByteByByte CRC32C long 4827 ns 3625 ns 4948 ns 5859 ns 5885 ns 10114 ns
Hash64 short (5 chars) 259 ns 258 ns 259 ns 289 ns 265 ns 363 ns
Hash64 medium (30 chars) 775 ns 760 ns 796 ns 889 ns 802 ns 1246 ns
Hash64 long (1000 chars) 7133 ns 6405 ns 7022 ns 7440 ns 6743 ns 10742 ns
Single string (reuse) 8.40 ns 7.96 ns 8.37 ns 11.9 ns 10.9 ns 18.7 ns

Integer hashing

Operation Linux GCC Linux Clang Windows MinGW GCC Windows Clang-GNU-CLI Windows Clang-MSVC-CLI Windows MSVC
Hash uint32 (1000×) 452 ns 771 ns 469 ns 1107 ns 1082 ns 1496 ns
Hash uint64 (1000×) 706 ns 227 ns 730 ns 332 ns 327 ns 1911 ns
Hash int32 (1000×) 453 ns 772 ns 469 ns 1081 ns 1042 ns 1442 ns
Hash64 uint64 (1000×) 842 ns 838 ns 825 ns 872 ns 849 ns 1172 ns

Algorithm comparison

Operation Linux GCC Linux Clang Windows MinGW GCC Windows Clang-GNU-CLI Windows Clang-MSVC-CLI Windows MSVC
CRC32C HW short (5 chars) 1.07 ns 1.18 ns 1.11 ns 1.62 ns 1.79 ns 2.41 ns
CRC32C SW short (5 chars) 18.3 ns 19.1 ns 18.4 ns 27.5 ns 29.8 ns 74.4 ns
CRC32C HW medium (30 chars) 15.6 ns 11.5 ns 10.8 ns 16.8 ns 19.1 ns 24.6 ns
CRC32C SW medium (30 chars) 205 ns 229 ns 212 ns 343 ns 361 ns 688 ns
std::hash short (5 chars) 350 ns 370 ns 273 ns 253 ns 314 ns 408 ns
std::hash medium (30 chars) 396 ns 381 ns 374 ns 849 ns 830 ns 1180 ns
std::hash long (1000 chars) 1088 ns 1095 ns 1144 ns 11149 ns 10905 ns 15230 ns
std::hash uint32 (1000×) 101 ns 103 ns 103 ns 2252 ns 2083 ns 1688 ns
std::hash uint64 (1000×) 287 ns 159 ns 294 ns 2849 ns 2679 ns 3248 ns
std::hash single string (reuse) 4.41 ns 4.24 ns 4.55 ns 17.4 ns 16.3 ns 25.7 ns
Combine64 FNV 1.05 ns 1.07 ns 1.08 ns 1.15 ns 1.15 ns 1.43 ns
Combine64 BoostMurmur 3.67 ns 3.52 ns 3.77 ns 3.68 ns 3.68 ns 4.71 ns

Memory access patterns

Operation Linux GCC Linux Clang Windows MinGW GCC Windows Clang-GNU-CLI Windows Clang-MSVC-CLI Windows MSVC
Cache test (100 strings) 20.8 ns 21.4 ns 20.4 ns 33.7 ns 27.6 ns 38.5 ns
Sequential (100 strings) 31.2 ns 21.9 ns 23.7 ns 28.7 ns 26.4 ns 45.2 ns
Random access (100 strings) 94.2 ns 42.8 ns 100 ns 57.7 ns 52.1 ns 140 ns

Benchmarks executed on November 15, 2025