why run the model_main.py it's so slow?(use faster-rcnn resnet101.coco)

I'm using the object detecton api and use the model_main.py to training a detection model,
I use the faster-rcnn resnet101.coco and batch size =1,but it's so slow?

what can I do to let it to be faster??

System information

• What is the top-level directory of the model you are using:
  model/research
• Have I written custom code (as opposed to using a stock example script provided in TensorFlow):
  no
• OS Platform and Distribution (e.g., Linux Ubuntu 16.04):
  win10
• TensorFlow installed from (source or binary):
  pip
• TensorFlow version (use command below):
  1.9.0
• Bazel version (if compiling from source):
  don't know
• CUDA/cuDNN version:
  cuda:9 , cuDNN:7
• GPU model and memory:
  ASUS ROG Strix GeForce® GTX 1080
• Exact command to reproduce:
  don't