REQUIRE has very large compilation time overhead

[wichtounet]

Hi,

After investigating the compilation time of my test cases, I have found that a lot of time was simply used by Catch and especially the REQUIRE macro. There are several reasons for that, but the main reason is that the macros are generating a lot of code and that because of the expression left and right hand sides deduction, it is hard to simplify the macros.

By introducing REQUIRE_EQUALS macros in my code and simplifying it to the maximum, I have been able to reduce the total compilation time of my tests by 27%!

If you are interested, you can have a look at: http://baptiste-wicht.com/posts/2016/06/reduce-compilation-time-by-another-16-with-catch.html for more information.

REQUIRE_EQUALS and CHECK_EQUALS may be something you want to consider for users that care about the compilation time.