Commits
Antoine Pitrou authored and Wes McKinney committed 398466e629b
ARROW-4079: [C++] Add machine benchmark Right now there is a single memory latency benchmark. Its output looks like this, showing the different cache levels up to main memory (this is on a CPU with 16 MB L3 cache): ``` ------------------------------------------------------------------ Benchmark Time CPU Iterations ------------------------------------------------------------------ BM_memory_latency/2048 2 ns 2 ns 406878405 548.706M items/s BM_memory_latency/4096 2 ns 2 ns 395414303 557.74M items/s BM_memory_latency/8192 2 ns 2 ns 394141916 560.264M items/s BM_memory_latency/16384 2 ns 2 ns 401410292 535.202M items/s BM_memory_latency/32768 2 ns 2 ns 381828811 525.377M items/s BM_memory_latency/65536 4 ns 4 ns 189027575 262.929M items/s BM_memory_latency/131072 5 ns 5 ns 150798287 209.01M items/s BM_memory_latency/262144 5 ns 5 ns 129287045 185.606M items/s BM_memory_latency/524288 7 ns 7 ns 96543517 132.663M items/s BM_memory_latency/1048576 11 ns 11 ns 66380535 89.0397M items/s BM_memory_latency/2097152 12 ns 12 ns 55003164 76.6384M items/s BM_memory_latency/4194304 13 ns 13 ns 51559443 70.9488M items/s BM_memory_latency/8388608 28 ns 28 ns 25813875 33.6881M items/s BM_memory_latency/16777216 66 ns 66 ns 10463216 14.4577M items/s BM_memory_latency/33554432 90 ns 90 ns 7743594 10.5434M items/s ``` Author: Antoine Pitrou <antoine@python.org> Closes #3225 from pitrou/ARROW-4079-machine-benchmark and squashes the following commits: 55f6de696 <Antoine Pitrou> ARROW-4079: Add machine benchmark