[DOC] add m5 performance

docs/start/performance.rst

@@ -40,8 +40,8 @@ The time-consuming specification generation is shown in the table below:
 ====================  ====================  =================================
 Dataset               Data Dimensions       Specification Generation Time (s)
 ====================  ====================  =================================
-PFS
-M5
+PFS                                         
+M5                                          9~15
 CIFAR10               9000*3*32*32          7~10
 ====================  ====================  =================================
 
@@ -51,7 +51,7 @@ The accuracy of search and reuse is shown in the table below:
 Dataset               Top-1 Performance    Job Selector Reuse                Average Ensemble Reuse
 ====================  ==================== ================================= =================================
 PFS
-M5
+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
 ====================  ==================== ================================= =================================