I wish the authors also compared accuracy, but here are their performance benchmarks. No surprises :)

https://www.mdpi.com/2313-433X/4/10/123/pdf

"An Overview of Watershed Algorithm Implementations in Open Source Libraries", J. Imaging 2018, 4(10), 123; https://doi.org/10.3390/jimaging4100123, Anton S. Kornilov and Ilia V. Safonov.

Best regards, Stéfan