benchmark-elementary-functions
This repository aims to test the performance and accuracy of different elementary functions (e.g. log, sin, cos...).
Logarithm Results
| Function | Time (us) | Average Error | Max Error |
|---|---|---|---|
| STD DOUBLE | 65.458 | 0 | 0 |
| STD SINGLE | 50.739 | 1.38617e-08 | 5.86492e-08 |
| FAST LOGF | 47.7693 | 1.43832e-08 | 7.55761e-08 |
| APPROXIMATE LOGF | 2.5359 | 5.74123e-06 | 1.49805e-05 |
| FASTER LOGF | 1.14601 | 0.0125169 | 0.0401875 |
Faster logf is 44 times faster than std::log but is also much less accurate.
SinCos Results
| Function | Time (ms) |
|---|---|
| STD SIN COS | 34.9386 |
| STD SINCOS | 34.8707 |
It seems that gcc-11 optimizes two different calls to sin and cos to the fast function sincos that computes both at the same time.