Add reusable reporting and native snapshot analytics - #4
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thinkingfish wants to merge 4 commits into
Open
thinkingfish wants to merge 4 commits into
thinkingfish wants to merge 4 commits into
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Adds interval reporting and snapshot analytics while preserving the existing counter-only recording path. Dense histograms gain reset, reusable snapshot/drain, transactional checked addition and a private-output checked sum. Scalar queries avoid batch containers; caller-buffer queries reuse result arrays, and allocating sparse batches now traverse sparse storage in sorted query order.
Sparse/cumulative merge and downsampling avoid dense reconstruction, cumulative snapshots decumulate directly, and transformed means are recomputed. Reporting/conversion rejects unsigned overflow; p100 uses the exact total even above floating-point integer precision. Existing recording and dense merge/downsample wrapping semantics remain intact. README explains phase selection, ownership, unsigned counts and fixed-size storage; a JMH harness separates reporting and analytics costs.
Validation: Java 17 Maven tests/install/package, JMH package and all 21 benchmark smoke methods with GC profiling. Independent cross-port review findings addressed. Smoke timings establish harness execution only; no port speedup claims or new runtime dependencies.
Local review follow-up:
CHANGELOG.md now explicitly identifies sparse zero normalization, checked report/cumulative total limits, and empty-buffer semantics as compatibility/Rust interoperability considerations. Local review found no confirmed defect; Java17/21 CI passed.