[shinya]

> - IF YOU USE THE BUILT IN CACHE, parallelism will be hard (you cannot populate part of the cache from a job, another part from another job and in the next step use the result of both cache)

You can use the `artifacts` and `dependencies` combo to leverage which artifact will be downloaded into a particular job.

For instance,

    bundle-install:
    stage: build
    script: ...
    artifacts:
        paths: [bin/*]

    yarn-install:
    stage: build
    script: ...
    artifacts:
        paths: [bin/*]

    rspec:
    stage: test
    script: ...
    dependencies: [bundle-install] # This downloads only `bundle-install` artifact to this job

    karma:
    stage: test
    script: ...
    dependencies: [yarn-install] # This downloads only `yarn-install` artifact to this job

    eslint:
    stage: test
    script: ...
    dependencies: [] # This downloads nothing

https://docs.gitlab.com/ee/ci/yaml/#dependencies explains how it works