I just spent some time running performance tests on FastMaps and HashMaps. Calling the get methods showed no speed difference. The Javalution classes seem to have a speed advantage in building Maps and Lists. They claim their FastSet.removeLast method is faster than the Java library. So, there is a speed advantage in certain scenarios, but not in all cases.

-Adrian

Sumit Pandit wrote:

*i have a question please make me correct if i am wrong :-*

if we compare  FastMap Vs HashMap,

*FastMap is faster than HashMap so long as the map is long lived and
relatively predictable in size. If you try to use it as a short-lived
general replacement for HashMap it may very well kill your performance.

*I found these lines some where in Google.
so does it mean that we should use HashMap for local variables ?

Also please explain me the performance issue if we use HashMap rather then
FastMap.

Thanks for suggestion.


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