speed up topology builder with concurrency

[ttafsir]

How would you like to improve the project?
A clear and concise description of what the problem is.

Describe the solution you'd like
A clear and concise description of what you want to happen.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.