[ovirt-devel] speed up engine development with SKIP_CHECKS

[Eitan Raviv]

for the below scenario of making a change limited to one module, where you
want a really fast install but do not want to forgo unit tests or checks,
you can run a direct install of just that module like so:

cd $DEV_ENGINE/backend/manager/modules/utils; mvn clean install && cp
target/utils-$ENGINE_VERSION-SNAPSHOT.jar
$DEP_ENGINE/share/ovirt-engine/modules/common/org/ovirt/engine/core/utils/main/utils.jar;
cd - #install utils-manager

where:

   - $DEV_ENGINE is your source code home dir
   - $DEP_ENGINE is your prefix dir
   - $ENGINE_VERSION is the current snapshot version. e.g. 4.2.0
   - using a hash at the end, allows me to quickly call this command with
   reverse search on bash


BUILD SUCCESS
[INFO]
------------------------------------------------------------------------
[INFO] Total time: 2.699s


:)

On Sun, Nov 12, 2017 at 7:28 PM, Greg Sheremeta <gshereme at redhat.com> wrote:

> Hi,
>
> I've added a SKIP_CHECKS flag to the ovirt-engine build here [1]. Thanks
> to Roy for the idea [2].
>
> TL;DR: you'll save roughly 2 minutes 10 seconds per full compile with
> SKIP_CHECKS. You'll save more (3 min 10 sec) if you don't need a 'clean'.
> You'll save the most (about 3 min 20 sec) if you can skip rebuilding GWT.
>
> Here are some statistics (3 runs per command, for averages sake)
>
> My test machine is a
> Intel(R) Core(TM) i5-3570 CPU @ 3.40GHz
> 256GB Samsung SSD (old, using SATA)
> 32GB DDR3 @ 1333 MT/s
>
> ---
>
> fresh master checkout
>
> no clean, no gwt, skip checks:
>
> make install-dev PREFIX=/home/greg/ovirt-engine BUILD_GWT=0 SKIP_CHECKS=1
> 1:04.38 total
> 1:06.04 total
> 1:04.41 total
>
> same as above, but now change one non-GWT class in the utils project
>
> make install-dev PREFIX=/home/greg/ovirt-engine BUILD_GWT=0 SKIP_CHECKS=1
> 1:05.49 total
>
> Ok, pretend we recompiled and our utils class change had an error.
> Same as above, change the one non-GWT class in the utils project again,
> and use the resume (-pl) functionality:
>
> make install-dev PREFIX=/home/greg/ovirt-engine BUILD_GWT=0 SKIP_CHECKS=1
> EXTRA_BUILD_FLAGS="-pl org.ovirt.engine.core:utils"
> 17.958 total  (yes, 18 seconds, obviously a world record for any engine
> build)
>
> [The resume piece is EXTRA_BUILD_FLAGS="-pl org.ovirt.engine.ui:webadmin"
> -- I personally need to use this more often!]
>
> ---
>
> no clean, no gwt, run checks (but skip unit tests):
>
> make install-dev PREFIX=/home/greg/ovirt-engine BUILD_GWT=0 BUILD_UT=0
> 3:07.66 total
> 3:16.69 total
> 3:14.28 total
>
> clean, no gwt, skip checks:
>
> make clean install-dev PREFIX=/home/greg/ovirt-engine BUILD_GWT=0
> SKIP_CHECKS=1
>
> 4:17.74 total
> 4:15.76 total
> 4:13.90 total
>
> no clean, gwt (1 permutation for chrome), skip checks:
>
> make install-dev PREFIX=/home/greg/ovirt-engine BUILD_GWT=1
> SKIP_CHECKS=1 DEV_EXTRA_BUILD_FLAGS_GWT_DEFAULTS="-Dgwt.userAgent=safari"
>
> 4:25.63 total
> 4:26.71 total
> 4:30.69 total
>
> no clean, gwt (1 permutation for chrome), run checks but skip unit tests:
>
> make install-dev PREFIX=/home/greg/ovirt-engine BUILD_GWT=1 BUILD_UT=0
> DEV_EXTRA_BUILD_FLAGS_GWT_DEFAULTS="-Dgwt.userAgent=safari"
>
> 6:44.23 total
>
> And the whole enchilada [3] ... clean, gwt (1 permutation for chrome), run
> checks, run unit tests:
>
> 11:52.25 total ... wow :)
>
>
> Hope this helps you have a faster change-compile-check cycle :)
>
> Best wishes,
> Greg
>
>
> [1] https://gerrit.ovirt.org/#/c/83961/
> [2] https://www.mail-archive.com/devel@ovirt.org/msg10377.html
> [3] https://idioms.thefreedictionary.com/whole+enchilada
>
>
> --
>
> GREG SHEREMETA
>
> SENIOR SOFTWARE ENGINEER - TEAM LEAD - RHV UX
>
> Red Hat NA
>
> <https://www.redhat.com/>
>
> gshereme at redhat.com    IRC: gshereme
> <https://red.ht/sig>
>
> _______________________________________________
> Devel mailing list
> Devel at ovirt.org
> http://lists.ovirt.org/mailman/listinfo/devel
>



-- 
IRC: erav
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