Id-keyed TagMap.set(long) + insertion-comparison benchmark#11901

Draft

dougqh wants to merge 12 commits into

dougqh/tag-registry-generatorfrom

dougqh/tag-id-api

Commits on Jul 15, 2026

Make the TagMap Entry pathway null-tolerant

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Mark tag keys @Nonnull on the TagMap write/create surface

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Brace single-statement null-check ifs per style convention

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Fold OptimizedTagMap into a final class TagMap (drop the interface)

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Drop EmptyHolder, make factories final, simplify test-helper instanceof

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Add TagMap read-through support (level-split phase 1 mechanism)

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Wire mergedTracerTags as a read-through parent at span build (level-split phase 1)

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Add StringIndex: a generic open-addressed string set

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Store known span tags densely in TagMap by tag-id

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Add bloom-filter fast-path to the dense tag store (skip knownIndexOf scan)

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Generate KnownTags from a tag-conventions registry

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Add id-keyed TagMap.set(long) + insertion-comparison benchmark

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