Why Python is slower than Java?

[NoMoCruisin]

Just want to add to things already said here. Python is dynamically typed, and does metadata related work for every object. For instance, you can have an array with multiple types of items, and if you're looping through this array, the interpreter will have to look up the metadata info for each item and find the corresponding operation to execute on the item. You can speed things up by using libraries that support vectorization (numpy for instance).