ref(flags): rewrite span flag tracking to not use global map #16651
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aliu39
requested review from
a team,
AbhiPrasad and
chargome
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@chargome I'm curious if the team has concerns on performance? If a customer is repeatedly evaluating 100s of flags and calling |
AbhiPrasad
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Jun 18, 2025
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We previously did have some issues with spanToJSON - but the performance should be much better now.
Might be nice to benchmark - you can probably test server-side with profiling a node app: https://nodejs.org/en/learn/getting-started/profiling
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Talked with @AbhiPrasad , closing for now until I get more bandwidth to play with benchmarking experiments. The map implementation should be fine for releasing |
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Follow up on #16485 (review)
Instead of tracking the evaluated feature flags in a global weakmap, we can directly check the span attributes by converting to JSON.