cppperf C++ performance guide (v0)cppperf rule ids (slugs)cppperf corpus targets cppperf evidence policy

cx-clock-hot — measured, still hint cx-const-by-value — measured, still hint cx-endl-hot — measured, still hint cx-ifstream-hot — measured, still hint cx-regex-ctor-hot — measured, still hint cx-vector-bool — measured, still hint

cx-clock-in-loop — renamed 2026-10-27 (Asia/Shanghai)cx-endl-in-loop — renamed 2026-10-27 (Asia/Shanghai)cx-ifstream-in-loop — renamed 2026-10-27 (Asia/Shanghai)cx-regex-ctor-in-loop — renamed 2026-10-27 (Asia/Shanghai)cx-sstream-in-loop — measured, still hint cx-sstream-in-loop — removed 2026-10-23 (Asia/Shanghai)cx-string-append-unreserved — string += grow vs reserve (-O2)cx-string-append-unreserved — removed 2026-10-23 (Asia/Shanghai)CX001 — removed CX001 — removed 2026-10-22 (Asia/Shanghai)CX003 — removed CX003 — removed 2026-10-22 (Asia/Shanghai)CX004 — removed CX004 — removed 2026-10-22 (Asia/Shanghai)

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

LanguagesC++Evidence_removed

CX004 — removed 2026-10-22 (Asia/Shanghai)

Status: removed. Jitter-controlled retest showed reverse/null speed claim.

No semantic slug was assigned; do not reuse CX004 or invent a replacement id with the same number.
Matcher deleted; historical JSONL (if any) kept beside this note.

CX004 — removed

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