Function startMeasure

packages/runtime-core/src/profiling.ts:11–22

(
  instance: ComponentInternalInstance,
  type: string,
)

let perf: Performance

export function startMeasure(
  instance: ComponentInternalInstance,
  type: string,
): void {
  if (instance.appContext.config.performance && isSupported()) {
    perf.mark(`vue-${type}-${instance.uid}`)
  }

  if (__DEV__ || __FEATURE_PROD_DEVTOOLS__) {
    devtoolsPerfStart(instance, type, isSupported() ? perf.now() : Date.now())
  }
}

export function endMeasure(
  instance: ComponentInternalInstance,