clang-tidy is really slow

$ for dir in out/*; time ninja -C $dir; end

    ninja: Entering directory `out/dbg'
    [12/12] Linking CXX executable tests
            0.17 real         0.23 user         0.20 sys

    ninja: Entering directory `out/dev'
    [12/12] Linking CXX executable tests
            0.14 real         0.19 user         0.19 sys

    ninja: Entering directory `out/tidy'
    [12/12] Linking CXX executable tests
            4.01 real        10.81 user         0.91 sys

Change-Id: Ica5ef913a644777cc600ad2added877b82913683
Reviewed-on: https://skia-review.googlesource.com/c/182851
Reviewed-by: Mike Klein <mtklein@google.com>
1 file changed