478 improve performance of mutation over time

[JonasKellerer]

resolves #478

Summary

The main change is this PR, is the introduction of web workers for the calculation of the mutations over time. This allows for parallel computation, which is not available otherwise in js.

You can not pass classes with functions to (and from) the web worker. Therefore, I introduced an interface for the temporal and mutation class, which only contains the data of the respective class. The same issue occurred for the Map2d class, which now can export/import the underlying data.

Testing of a component using the web worker is done through a mock. The mock is enabled using special import directives. This was necessary, since the current mocking approach only allows to mock calls on the same thread.

In this PR also includes

• a fix, where the initial mutation call (which calculates all mutations in the time window) did not include the same dates as the single mutation calls for each time window.
• a performance improvement in the filtering step of the mutations. Now the filtering is done only on the overall mutations, and the map is then updated.
• a minor fix, where the tag of mutation over time component is not correctly exported

The playwright snapshot tests needed to be updated. The values changed, due to the fix of the overall mutation call and because we call a pango lineage with asterix (JN.1*). Since our last snapshot of the data, there were some other lineages assigned as children of that lineage, which changes the proportion.

Screenshot

PR Checklist

• All necessary documentation has been adapted.
• The implemented feature is covered by an appropriate test.

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Name	Status	Preview	Comments	Updated (UTC)
dashboard-components	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Nov 6, 2024 8:07am

[github-actions]

This is a preview of the changelog of the next release. If this branch is not up-to-date with the current main branch, the changelog may not be accurate. Rebase your branch on the main branch to get the most accurate changelog.

Note that this might contain changes that are on main, but not yet released.

Changelog:

0.6.19 (2024-11-06)

Bug Fixes

• components: correctly export tag of mutations over time (4a2be94)
• components: mutation over time initial query with missing dates (d68419b)

Performance Improvements

• components: improve performance of mutations over time filters (ffc2629)
• components: use web worker for mutations over time calculation (8f2fbb6)

[fengelniederhammer]

Looks good! Just a couple of minor things.

[fengelniederhammer]

LGTM