Parallel Lockstep

[Cl4sm]

It'd be nice to build all docker containers in lockstep in parallel.
The locksteps should not interfere with each other afaik.

[Lukas-Dresel]

Counterpoint: buildguy depends on symcts build to avoid having to rebuild everything from scratch (all of LLVM twice)

[Lukas-Dresel]

similarly for symcc

[Lukas-Dresel]

To be clear, I'm not saying we can't/shouldn't do this. There's a good chance rebuilding twice in parallel will be faster. But these containers get quite big already, so there's a tradeoff to be made.

[rhelmot]

Alternately: we can formalize some specific lock steps and the locker can e.g. feed them to docker who can parallelize them at will