Note that you are possibly going to have a hard time finding this..."fastest" is usually not something people care about. They generally care about how quickly time grows as the sample grows.
In other words, there may be a collection that always takes 20 seconds to return an element you are searching for. there may be another that take 1/100th of a second per element in the collection. Which is faster?
well, if I have 20 elements, option A takes 20 seconds, option b takes 1/5th of a second.
If i have 1,000,000 elements, option A takes 20 seconds. Option B takes about three hours.
Which collection is 'faster'? The answer is "it depends on your data set".
Never ascribe to malice that which can be adequately explained by stupidity.