Optimization to building OPAL Class Hierarchies

[mir-am]

Description

This is a small PR that makes the following changes:

• creates a new method asURIHierarchyParallel() to create Fasten URIs in parallel. The speed up is 2 times, especially for large graphs.
• Make createGraphWithExternalCHA faster by using parallel stream.

Overall, the speed up is up to 2-3x times.

Motivation and context

When creating (very large) partial call graphs, building FURI hierarchies can be very time-consuming if it's done in single-thread mode.

Testing

Unit tests pass for the OPAL plugin.

[mir-am]

@ashkboos, thanks a lot, Mehdi, for the contribution and help with the optimization of OPAL data structures.

[mir-am]

@ashkboos What is the verdict on this PR? Shall we merge it into develop?

[ashkboos]

@ashkboos What is the verdict on this PR? Shall we merge it into develop?

To me it's fine. Unless Sebastian also wants to take a look.

[mir-am]

I would like to request a review from @proksch as he recently refactored OPALPartialCallGraphConstructor.

[MagielBruntink]

What is the status of this PR? Do we still want to merge it?

[mir-am]

Hi Magiel,

We can still merge this PR, though it's not necessary. We made some improvements to class hierarchy construction to speed up experiments for research work.

On Tue, Feb 21, 2023, 11:58 MagielBruntink @.***> wrote:

What is the status of this PR? Do we still want to merge it?

— Reply to this email directly, view it on GitHub https://github.com/fasten-project/fasten/pull/490#issuecomment-1438091353, or unsubscribe https://github.com/notifications/unsubscribe-auth/ACEGEBVZHKWOVP76NG3ZUODWYR7UZANCNFSM6AAAAAAQNJRZHY . You are receiving this because you were assigned.Message ID: @.***>