COREWEB-41 - Offload bundling

[SimenB]

JIRA Issue

COREWEB-41

Status

READY

Description

We want to offload bundling to another thread/process to not lock up resources on potentially CPU heavy work.

As we use promises, worker-farm is not an option (it only supports callbacks), so I chose to go with jest-worker, which is what runs Jest tests in parallel.

I have not added new tests, as the observable behaviour is identical, beyond some extra needed cleanup work. We don't have programmatic API documented in the README, perhaps we should?

Todos

• Tests
• Documentation

Deploy Notes

N/A

Related PRs

• None

[digitalsadhu]

Super nice.

Are there any possible complications or issues with using workers that we should test for?

Trying to think of edge cases like bundling the same bundle several times, multiple bundlings simultaneously etc.

Theres probably not super much so long as we trust jest-worker and its test coverage.

[SimenB]

22.0.0 is coming any day now, will hold on merging until then

[digitalsadhu]

whats the difference?

[SimenB]

No code difference, I just dislike beta dependencies

[SimenB]

There will be a code difference, actually: jestjs/jest#5068

[SimenB]

Trying to think of edge cases like bundling the same bundle several times, multiple bundlings simultaneously etc.

We still await at the same spot, the only thing different is that we might queue things up there, instead of having the client nag us until we can handle the request. We now await an operation in another process instead of the same thread, control flow should be the exact same