Absl vs Boost 1.80 vs std::unordered_map

gistfile1.txt

Loaded 183978 IPs into memory

AMD Ryzen 5 3600 6-Core Processor

std::map big endian 
Total lookup time is 58 seconds
Million of lookup ops per second: 3.12534
Total scan time is 16 seconds
Million of full scan ops per second: 8.33437
Accumulator value to guarantee no optimisation tricks from compiler: 183978000000

std::map little endian 
Total lookup time is 59 seconds
Million of lookup ops per second: 3.14655
Total scan time is 15 seconds
Million of full scan ops per second: 8.34393
Accumulator value to guarantee no optimisation tricks from compiler: 183978000000

std::unordered_map big endian
Total lookup time is 8 seconds
Million of lookup ops per second: 24.4749
Total scan time is 10 seconds
Million of full scan ops per second: 12.2954
Bucket number: 172933
Accumulator value to guarantee no optimisation tricks from compiler: 183978000000

std::unordered_map little endian
Total lookup time is 8 seconds
Million of lookup ops per second: 25.2212
Total scan time is 10 seconds
Million of full scan ops per second: 12.2536
Bucket number: 172933
Accumulator value to guarantee no optimisation tricks from compiler: 183978000000

boost::unordered_map big endian 
Total lookup time is 6 seconds
Million of lookup ops per second: 32.9995
Total scan time is 4 seconds
Million of full scan ops per second: 34.967
Bucket number: 196613
Accumulator value to guarantee no optimisation tricks from compiler: 183978000000

boost::unordered_map little endian 
Total lookup time is 5 seconds
Million of lookup ops per second: 33.7007
Total scan time is 4 seconds
Million of full scan ops per second: 35.2546
Bucket number: 196613
Accumulator value to guarantee no optimisation tricks from compiler: 183978000000

absl::flat_hash_map little endian 
Total lookup time is 5 seconds
Million of lookup ops per second: 33.9046
Total scan time is 2 seconds
Million of full scan ops per second: 102.692
Bucket number: 0
Accumulator value to guarantee no optimisation tricks from compiler: 183978000000

absl::flat_hash_map big endian 
Total lookup time is 5 seconds
Million of lookup ops per second: 34.0047
Total scan time is 1 seconds
Million of full scan ops per second: 98.0388
Bucket number: 0
Accumulator value to guarantee no optimisation tricks from compiler: 183978000000