在开始对比测试前，需安装Bayesian Optimization
- 测试函数：Branin (2d)
- Budget: 200
- Repeat num: 10
| Method | Minimum | Best minimum | Mean f_calls to min | Std f_calls to min | Fastest f_calls to min |
|---|---|---|---|---|---|
| bayes_opt(bo) | 0.398+/-0.000 | 0.398 | 97.0 | 50.367 | 39 |
| XBBO(bo-gp) | 0.398+/-0.000 | 0.398 | 42.0 | 5.0398 | 30 |