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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LanguagesC++Evidence_removed

cx-sstream-in-loop — removed 2026-10-23 (Asia/Shanghai)

Status: removed. At -O2, building an ostringstream every iteration versus clearing one stream was 1.24× (100000 ops, two small insertions). The earlier 1.80× figure was the same shape and still small.

Slug never reused.
Historical JSONL and markdown stay beside this note. Fixtures moved under _removed/fixtures/.
Gate: a fair microbench that stays near 1× cannot remain an active lint.

cx-sstream-in-loop — measured, still hint

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