method Performance.mark
#Performance.mark(markName: string,options?: PerformanceMarkOptions,): PerformanceMarkStores a timestamp with the associated name (a "mark").
Parameters #
#markName: stringoptional
#options: PerformanceMarkOptions#Performance.mark(markName: string,options?: PerformanceMarkOptions,): PerformanceMarkStores a timestamp with the associated name (a "mark").
#markName: string#options: PerformanceMarkOptions