Originally Python was not designed for numeric computation. As people started using python for various tasks, the need for fast numeric computation arose. And the Numpy was created by a group of people in 2005 to address this challenge.
Many Numpy operations are implemented in C, avoiding the general cost of loops in Python, pointer indirection and per-element dynamic type checking. The speed boost depends on which operations you're performing, but a few orders of magnitude isn't uncommon in number crunching programs.
The following are the main reasons behind the fast speed of Numpy.
1. Numpy array is a collection of similar data-types that are densely packed in memory. A Python list can have different data-types, which puts lots of extra constraints while doing computation on it.
2. Numpy is able to divide a task into multiple subtasks and process them parallelly.
3. Numpy functions are implemented in C. Which again makes it faster compared to Python Lists.
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