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xAOD::BTaggingUtilities Update, master branch (2021.05.11.)

Attila Krasznahorkay requested to merge akraszna/athena:getBTaggingUpdate-master-20210511 into master

While working on !43427 (merged), I found that xAOD::BTaggingUtilities::getBTagging presented a small-ish bottleneck.

getBTagging-threading

Since most of the clients of these functions do not specify an explicit string name for the btag link variable, I thought the simplest way to fix this would be to introduce a separate implementation of the functions that do not take the extra string variable...

This seems to have worked. With this fix included xAOD::BTagging::getBTagging completely disappeared from my profiles. It's a small victory, but a victory nevertheless. 😉

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