@@ -2,10 +2,9 @@ import type * as ts from 'typescript';
22import  {  Performance  }  from  '../../profile/Performance' ; 
33
44interface  TypeScriptPerformance  { 
5-   enable ( ) : void ; 
6-   disable ( ) : void ; 
7-   mark ( name : string ) : void ; 
8-   measure ( name : string ,  startMark ?: string ,  endMark ?: string ) : void ; 
5+   enable ?( ) : void ; 
6+   disable ?( ) : void ; 
7+   forEachMeasure ?( callback : ( measureName : string ,  duration : number )  =>  void ) : void ; 
98} 
109
1110function  getTypeScriptPerformance ( typescript : typeof  ts ) : TypeScriptPerformance  |  undefined  { 
@@ -20,27 +19,17 @@ function connectTypeScriptPerformance(
2019  const  typeScriptPerformance  =  getTypeScriptPerformance ( typescript ) ; 
2120
2221  if  ( typeScriptPerformance )  { 
23-     const  {  mark,  measure }  =  typeScriptPerformance ; 
2422    const  {  enable,  disable }  =  performance ; 
2523
26-     typeScriptPerformance . mark  =  ( name )  =>  { 
27-       mark ( name ) ; 
28-       performance . mark ( name ) ; 
29-     } ; 
30-     typeScriptPerformance . measure  =  ( name ,  startMark ,  endMark )  =>  { 
31-       measure ( name ,  startMark ,  endMark ) ; 
32-       performance . measure ( name ,  startMark ,  endMark ) ; 
33-     } ; 
34- 
3524    return  { 
3625      ...performance , 
3726      enable ( )  { 
3827        enable ( ) ; 
39-         typeScriptPerformance . enable ( ) ; 
28+         typeScriptPerformance . enable ?. ( ) ; 
4029      } , 
4130      disable ( )  { 
4231        disable ( ) ; 
43-         typeScriptPerformance . disable ( ) ; 
32+         typeScriptPerformance . disable ?. ( ) ; 
4433      } , 
4534    } ; 
4635  }  else  { 
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