Re:Warp, a fast preprocessor for C and C++
by DannyBee on Friday March 28, 2014 @03:05PM
(#7489286)
You know of a project that takes 3 hours of time to preprocess with clang?
I have serious doubts. Overall compilation time is kind of irrelevant to this discussion, because Warp is just a preprocessor.
While you can get some X speedup to gcc by replacing the preprocessor, X, as a factor of overall compilation time, is usually 0.2-0.5 in most cases, depending on size of file.
I expect the gains warp gets over gcc overall from preprocessing to be similar to those clang gets over gcc overall from preprocessing.
(Though it depends on the size of files being compiled, etc).
Most companies that want actual fast overall compilation and have the resources, build caching distributed compilation infrastructure (Google, Facebook).
As mentioned, if warp is really that much faster than clang's preprocessor that it mattered, clang would be fixed :)
I have serious doubts. Overall compilation time is kind of irrelevant to this discussion, because Warp is just a preprocessor.
While you can get some X speedup to gcc by replacing the preprocessor, X, as a factor of overall compilation time, is usually 0.2-0.5 in most cases, depending on size of file.
I expect the gains warp gets over gcc overall from preprocessing to be similar to those clang gets over gcc overall from preprocessing.
(Though it depends on the size of files being compiled, etc).
Most companies that want actual fast overall compilation and have the resources, build caching distributed compilation infrastructure (Google, Facebook).
As mentioned, if warp is really that much faster than clang's preprocessor that it mattered, clang would be fixed :)