Table 3.

Mobile-device model run-time benchmarks.

	Processor type
Mobile phone	GPU mean ± standard deviation	CPU w/ XNNPACK library (4 threads)	CPU (4 threads)
Pixel 3	0.9 ± 0.1 s	2.1 ± 1.0 s	13.2 ± 2.9 s
Pixel 4	0.2 ± 0.1 s	1.5 ± 0.8 s	9.8 ± 2.5 s
Samsung Galaxy S10	0.5 ± 0.1 s	1.7 ± 1.1 s	10.3 ± 2.3 s
Xiaomi Mi 9	1.0 ± 0.2 s	1.8 ± 1.3 s	13.7 ± 3.4 s

Time to model inference results (mean and standard deviation in seconds) measured from the end of a 10-s-long blind-sweep video. Both gestational age and fetal malpresentation models run simultaneously on the same video sequence and image preprocessing operations are included. Near real-time inference is achievable on smartphones with graphics processing units or compute libraries optimized for neural network operations. This enables a simple and fast examination procedure in clinical environments.