Return geometry by value (alternative 2)

[SoilRos]

To avoid copying a shared pointer, which is rather costly, the geometry now stores a variant holding either the ownership or a non-owning view to the entity variable. In the case of entity variables owned by the grid, a non-owning storage is fine as the geometry should not outlive the grid. On grid refinement the grid points are only owned by the geometry, so a move into the geometry is preferred.

Note that this PR is based on #885 which fixes all the lifetime issues of the geometry objects.

[aritorto]

jenkins build this serial please

[SoilRos]

I just noticed that there exists Opm::VisitorOverloadSet too. Is there a reason for choosing one or the other?

[SoilRos]

jenkins build this serial please

[SoilRos]

jenkins build this serial please

[blattms]

benchmark please

[blattms]

Benchmark results did not get posted back here. I am on it.
The gist of the benchmark is, that there is sometimes a small increase in solution time (less than .5%). Some a runs are even faster. None really slower.

[blattms]

benchmark please

[blattms]

Manually posting results from run on July 9:

Test	Configuration	Relative
opm-git	OPM Benchmark: drogon - Threads: 1	1.002
opm-git	OPM Benchmark: drogon - Threads: 8	0.885
opm-git	OPM Benchmark: punqs3 - Threads: 1	0.991
opm-git	OPM Benchmark: punqs3 - Threads: 8	0.982
opm-git	OPM Benchmark: smeaheia - Threads: 1	0.996
opm-git	OPM Benchmark: smeaheia - Threads: 8	0.923
opm-git	OPM Benchmark: spe10_model_1 - Threads: 1	0.999
opm-git	OPM Benchmark: spe10_model_1 - Threads: 8	1.007
opm-git	OPM Benchmark: flow_mpi_norne - Threads: 1	1.003
opm-git	OPM Benchmark: flow_mpi_norne - Threads: 8	0.934
opm-git	OPM Benchmark: flow_mpi_norne_4c_msw - Threads: 1 - FOPT (Total Oil Production At End Of Run)	1
opm-git	OPM Benchmark: flow_mpi_norne_4c_msw - Threads: 8	0.909

• Speed-up = Total time master / Total time pull request. Above 1.0 is an improvement. *

View result details @ https://ytelses.com/opm/?page=result&id=2816

[ytelses]

Benchmark result overview:

Test	Configuration	Relative
opm-git	OPM Benchmark: drogon - Threads: 1	1.007
opm-git	OPM Benchmark: drogon - Threads: 8	0.899
opm-git	OPM Benchmark: punqs3 - Threads: 1	1.002
opm-git	OPM Benchmark: punqs3 - Threads: 8	0.991
opm-git	OPM Benchmark: smeaheia - Threads: 1	1.006
opm-git	OPM Benchmark: smeaheia - Threads: 8	0.922
opm-git	OPM Benchmark: spe10_model_1 - Threads: 1	1.004
opm-git	OPM Benchmark: spe10_model_1 - Threads: 8	0.991
opm-git	OPM Benchmark: flow_mpi_extra - Threads: 1	1
opm-git	OPM Benchmark: flow_mpi_extra - Threads: 8	0.898
opm-git	OPM Benchmark: flow_mpi_norne - Threads: 1	0.998
opm-git	OPM Benchmark: flow_mpi_norne - Threads: 8	0.923
opm-git	OPM Benchmark: flow_mpi_norne_4c_msw - Threads: 1 - FOPT (Total Oil Production At End Of Run)	1
opm-git	OPM Benchmark: flow_mpi_norne_4c_msw - Threads: 8 - FOPT (Total Oil Production At End Of Run)	1

• Speed-up = Total time master / Total time pull request. Above 1.0 is an improvement. *

View result details @ https://www.ytelses.com/opm/?page=result&id=2823

[SoilRos]

jenkins build this serial please

[SoilRos]

jenkins build this serial please

[SoilRos]

jenkins build this serial please

[SoilRos]

Closing in favor of #1055.