jvmperf Java and Kotlin Performance Guide: Less Memory, More Throughput jvmperf rule ids (slugs)jvmperf corpus targets jvmperf evidence policy

jp-android-sparse-array — pending measure jp-baos-tobytearray-copy jp-bitmap-decode-no-reuse — pending measure jp-boxed-primitive-collection — boxed primitive collection jp-boxed-stream jp-client-factory-recreate jp-collection-chain jp-data-copy-hot jp-enum-key-hash-collection jp-exception-control-flow jp-expensive-alloc-hot — expensive alloc in loop (scope + negative pool myth)jp-finalize — pending measure jp-format-hot — `String.format` / format in hot loop jp-hot-format-log — pending measure jp-hot-heavy-alloc — pending measure jp-hot-payload-copy jp-hot-post-lambda — pending measure jp-hot-system-call — pending measure jp-lambda-to-non-inline-hot jp-lazy-default-mode — pending measure jp-log-hot jp-non-static-field-updater jp-regex-hot — regex compile in loop jp-sleep-polling — pending measure jp-string-concat-hot — string concat in loop (`+=` / `s = s + …`)jp-string-intern-hot jp-ui-text-append — pending measure jp-unpresized-collection — unpresized collection fill jp-value-class-boxing vt-unsafe-threadlocal-pool — not shipped (guide-first)

jvmperf `lib/` — optional bench jars (not in git)

Project

Contributing Changelog Security Policy Contributor Covenant Code of Conduct AGENT.md — XPerf agent operating contract

LanguagesJavaEvidence

jp-sleep-polling — pending measure

Status

pending measure — no evidence/jp-sleep-polling.jsonl on this machine.

Reason

Thread.sleep polling — wall-clock is dominated by the sleep itself; replacing with park/condition is correctness/latency design, not a micro ratio we can honestly gate as error.

Policy

Default severity off (run it with --enable). Do not escalate to error without honest before/after on the right runtime.

jp-regex-hot — regex compile in loop

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