A comparison of common methods and efficiencies in Python merging two dictionaries

This article illustrates the common method of Python merging two dictionaries with efficiency comparisons. Share to everyone for your reference. The specific analysis is as follows:

The following code illustrates 5 methods of merging two dictionaries and makes a simple performance test

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In addition to the F4 method that can cause destructive modifications to the dictionary D1, several other methods return the merged results as a new dictionary.

Here is the test result:

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F1 cost:2.382999897 F2 cost:4.45399999619 f3 cost:3.02100014687 f4 cost:1.73000001907 f5 cost:2.3710000515 f6 cost:2.8970 0007439 F7 cost:2.35600018501

It can be seen that F4 is the most efficient, and the F4 method is recommended if you do not need to keep the original dictionary.

I hope this article will help you with your Python programming.