Most likely. Terry vs Ohio would not be ruled constitutional if it was only applied to 90% black and brown people.
No,I did not https://en.wikipedia.org/wiki/Stop-and-frisk_in_New_York_City "Ninety percent of those stopped in 2017 were African-American or Latino, mostly aged 14–24. Seventy percent of those stopped were later found to be innocent"
What is efficient is not always constitutional.Stopping all crime would be way more efficient if the constitution didn't have to be followed.