[jira] [Resolved] (IMPALA-12807) Add option to use the 'mold' linker

["Joe McDonnell (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IMPALA-12807?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Joe McDonnell resolved IMPALA-12807.
------------------------------------
    Fix Version/s: Impala 4.3.0
       Resolution: Fixed

> Add option to use the 'mold' linker
> -----------------------------------
>
>                 Key: IMPALA-12807
>                 URL: https://issues.apache.org/jira/browse/IMPALA-12807
>             Project: IMPALA
>          Issue Type: Improvement
>          Components: Backend
>    Affects Versions: Impala 4.3.0
>            Reporter: Joe McDonnell
>            Assignee: Joe McDonnell
>            Priority: Major
>             Fix For: Impala 4.3.0
>
>
> Mold is a new linker that says it is faster than lld and gold. See [https://github.com/rui314/mold]
> Hand testing it on my machine, it makes a big difference in speed of iteration:
> {noformat}
> # Test case:
> #  - Start with fully built impalad
> #  - touch be/src/scheduling/scheduler.cc 
> #  - time make -j12 impalad
> With Gold (current default):
> real    0m15.843s
> user    0m15.478s
> sys     0m2.127s
> real    0m15.820s
> user    0m15.302s
> sys     0m2.157s
> real    0m16.136s
> user    0m15.799s
> sys     0m2.098s
> With Mold:
> real    0m2.479s
> user    0m2.169s
> sys     0m0.958s
> real    0m2.674s
> user    0m2.218s
> sys     0m1.086s
> real    0m2.524s
> user    0m2.136s
> sys     0m1.042s{noformat}
> This seems like something we should investigate further.



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