Skip to content

Model Benchmarking with Ultralytics YOLO


Once your model is trained and validated, the next logical step is to evaluate its performance in various real-world scenarios. Benchmark mode in Ultralytics YOLOv8 serves this purpose by providing a robust framework for assessing the speed and accuracy of your model across a range of export formats.

Why Is Benchmarking Crucial?

  • Informed Decisions: Gain insights into the trade-offs between speed and accuracy.
  • Resource Allocation: Understand how different export formats perform on different hardware.
  • Optimization: Learn which export format offers the best performance for your specific use case.
  • Cost Efficiency: Make more efficient use of hardware resources based on benchmark results.

Key Metrics in Benchmark Mode

  • mAP50-95: For object detection, segmentation, and pose estimation.
  • accuracy_top5: For image classification.
  • Inference Time: Time taken for each image in milliseconds.

Supported Export Formats

  • ONNX: For optimal CPU performance
  • TensorRT: For maximal GPU efficiency
  • OpenVINO: For Intel hardware optimization
  • CoreML, TensorFlow SavedModel, and More: For diverse deployment needs.


  • Export to ONNX or OpenVINO for up to 3x CPU speedup.
  • Export to TensorRT for up to 5x GPU speedup.

Usage Examples

Run YOLOv8n benchmarks on all supported export formats including ONNX, TensorRT etc. See Arguments section below for a full list of export arguments.

from ultralytics.utils.benchmarks import benchmark

# Benchmark on GPU
benchmark(model='', data='coco8.yaml', imgsz=640, half=False, device=0)
yolo benchmark data='coco8.yaml' imgsz=640 half=False device=0


Arguments such as model, data, imgsz, half, device, and verbose provide users with the flexibility to fine-tune the benchmarks to their specific needs and compare the performance of different export formats with ease.

Key Value Description
model None path to model file, i.e., yolov8n.yaml
data None path to YAML referencing the benchmarking dataset (under val label)
imgsz 640 image size as scalar or (h, w) list, i.e. (640, 480)
half False FP16 quantization
int8 False INT8 quantization
device None device to run on, i.e. cuda device=0 or device=0,1,2,3 or device=cpu
verbose False do not continue on error (bool), or val floor threshold (float)

Export Formats

Benchmarks will attempt to run automatically on all possible export formats below.

Format format Argument Model Metadata Arguments
PyTorch - -
TorchScript torchscript yolov8n.torchscript imgsz, optimize
ONNX onnx yolov8n.onnx imgsz, half, dynamic, simplify, opset
OpenVINO openvino yolov8n_openvino_model/ imgsz, half
TensorRT engine yolov8n.engine imgsz, half, dynamic, simplify, workspace
CoreML coreml yolov8n.mlpackage imgsz, half, int8, nms
TF SavedModel saved_model yolov8n_saved_model/ imgsz, keras
TF GraphDef pb yolov8n.pb imgsz
TF Lite tflite yolov8n.tflite imgsz, half, int8
TF Edge TPU edgetpu yolov8n_edgetpu.tflite imgsz
TF.js tfjs yolov8n_web_model/ imgsz
PaddlePaddle paddle yolov8n_paddle_model/ imgsz
ncnn ncnn yolov8n_ncnn_model/ imgsz, half

See full export details in the Export page.

Created 2023-03-12, Updated 2023-09-13
Authors: glenn-jocher (13), maianumerosky (1), Laughing-q (1), sergiuwaxmann (1), AyushExel (1)