Function profiler

packages/node-core/src/profiler.ts:25–51

()

}

export function profiler(): MethodDecorator {
  return (target, name: string | symbol, descriptor: PropertyDescriptor): void => {
    if (enableProfiler && !!descriptor && typeof descriptor.value === 'function') {
      const orig = descriptor.value;
      // tslint:disable no-function-expression no-invalid-this
      descriptor.value = function (...args: any[]): any {
        const start = performance.now();
        const res = orig.bind(this)(...args);
        if (isPromise(res)) {
          res.then(
            (_: any) => {
              printCost(start, performance.now(), target.constructor.name, name);
              return _;
            },
            (err: any) => {
              printCost(start, performance.now(), target.constructor.name, name);
              throw err;
            }
          );
        } else {
          printCost(start, performance.now(), target.constructor.name, name);
        }
        return res;
      };
    }
  };
}

type AnyFn = (...args: any[]) => any;