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ci: Use multiple codegen units on non-dist bots #44675

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ci: Use multiple codegen units on non-dist bots #44675

wants to merge 1 commit into from

Commits on Sep 21, 2017

  1. ci: Use multiple codegen units on non-dist bots 

    This commit is yet another attempt to bring down our cycle times by
parallelizing some of the long-and-serial parts of the build, for example
optimizing the libsyntax, librustc, and librustc_driver crate. The hope is that
any perf loss from codegen units is more than made up for with the perf gain
from using multiple codegen units.

The value of 8 codegen units here is pretty arbitrary, it's basically just a
number which hopefully means that the cores are always nice and warm. Also a
previous version of this commit bounced on Windows CI due to libstd being
compiled with multiple codegen units, so only the compiler is now compiled with
multiple codegen units.
    @alexcrichton
    alexcrichton committed Sep 21, 2017
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