C++17 – better than you might think

Re:C++17 – better than you might think by thechao on Thursday December 29, 2016 @11:36AM (#13278241)

Preprocess your source 'cat' the results together; then, hand off to the compiler. On a 2015 MacBookPro I've seen upwards of 100kloc/s. Probably average 30--60kloc/s. With ccache my 5mloc code base takes as little as 300ms to do incremental compile & relink.

Another thing is to rely on the preprocessor for code generation; then you're dealing with memory-speed elaboration of the AST, rather than reading off of disk.

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Re:C++17 – better than you might think by dibanez on Thursday December 29, 2016 @01:31PM (#13279020)

I did the single file trick for the small library that I control, as a configure option. It definitely does help, 2X speedup in serial compile time typically. however, you lose the ability to compile in parallel, which with my hardware gives a 16X speedup, so for now parallel compiles are the winner.

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