fn := filepath.Join(dirPath, "cpuio.out")
		f, err := Create(fn)
		if err != nil {
			return nil, err
		}
		stop := fgprof.Start(f, fgprof.FormatPprof)
		startedAt := time.Now()
		prof.stopFn = func() ([]byte, error) {
			if elapsed := time.Since(startedAt); elapsed < 100*time.Millisecond {
				// Light hack around https://github.com/felixge/fgprof/pull/34
				time.Sleep(100*time.Millisecond - elapsed)
			}
			err := stop()