[DOC] add pfs performance

docs/start/performance.rst

@@ -40,7 +40,7 @@ The time-consuming specification generation is shown in the table below:
 ====================  ====================  =================================
 Dataset               Data Dimensions       Specification Generation Time (s)
 ====================  ====================  =================================
-PFS                                         
+PFS                                         < 1.5
 M5                                          9~15
 CIFAR10               9000*3*32*32          7~10
 ====================  ====================  =================================
@@ -50,7 +50,7 @@ The accuracy of search and reuse is shown in the table below:
 ====================  ==================== ================================= =================================
 Dataset               Top-1 Performance    Job Selector Reuse                Average Ensemble Reuse
 ====================  ==================== ================================= =================================
-PFS
+PFS                     1.955 +/- 2.866    2.175 +/- 2.847                    1.950 +/- 2.888
 M5                      2.066 +/- 0.424    2.116 +/- 0.472                    2.512 +/- 0.573
 CIFAR10                 0.619 +/- 0.138    0.585 +/- 0.056                    0.715 +/- 0.075
 ====================  ==================== ================================= =================================