my build time impact of clang 5.0

[Andriy Gapon]

On 02/10/2017 21:34, Dan Mack wrote:
> 
> Another significant change in build times this week - not complaining,
> just my observations on build times; same server doing buildworld during
> the various phases of compiler changes over the last year or so FWIW:
> 
> |--------------+--------------+---------------+----------+-----------|
> | Ver (svn-id) | World (mins) | Kernel (mins) | Relative | Comment   |
> |--------------+--------------+---------------+----------+-----------|
> |       292733 |           90 |            16 |      0.5 |           |
> |       299948 |           89 |            16 |      0.5 |           |
> |       322724 |          174 |            21 |      1.0 | clang 4.x |
> |       323310 |          175 |            21 |      1.0 | clang 4.x |
> |       323984 |          175 |            21 |      1.0 | clang 4.x |
> |       324130 |          285 |            21 |      1.6 | clang 5.x |
> |       324204 |          280 |            21 |      1.6 | clang 5.x |
> |--------------+--------------+---------------+----------+-----------|

It shocked me to a realize that I can build several platforms that do not have
clang support yet (like powerpc) one after another in a fraction of time
required to build just amd64.

-- 
Andriy Gapon