Chapter 23 // Exercise 5 - Principles & Practice Using C++

In this exercise I am using Visual Studio 2019 and a modified version of the std_lib_facilities header found here.

Chapter 23 // Exercise 5

Find a large email message file (thousands of messages) and then time it as written with a multimap and with multimap replaced by an unordered_multimap. Note that our application does not take advantage of the ordering of the multimap.

Github: https://github.com/l-paz91/principles-practice/tree/master/Chapter%2023/Exercise%205

This one was interesting. I used my random email generator to create a text file with 5555 emails in it.

https://github.com/l-paz91/RandomEmailMessageTextFileGenerator

Then created 2 functions and timed them as he shows on page 1015.

The multimap took 12.591 seconds.

The unordered multimap took 12.48 seconds.