On Thursday, 3 November 2016 at 03:43:06 UTC, Vladimir Panteleev
wrote:
For each function that is only called during compilation (e.g.
for code generation), at the top add:
if (!__ctfe)
return;
That's it. For one project, this brought compilation time (with
optimizations) from over an hour down to seconds!
As it turns out, DMD will codegen all functions, even templated
ones when they're instantiated, whether they're called by
something or not.
Sounds like an issue. Although, I almost think a @noctfe tag
which would refuse to compile/use code during CTFE, or in effect
add that line at the beginning to functions invisibly.
Obviously having functions only voluntarily used for CTFE would
be a pain. having a section Opt Out after a certain point seems
more useful, and would require far less work for the programmers.
