goperf Go performance guide (v0)goperf rule ids (slugs)goperf corpus targets goperf evidence policy

gp-append-nil-slice — append on nil slice vs make(...,0,len)gp-defer-hot — defer in loop vs close each (synthetic closer)gp-fmt-hot — fmt.Sprintf in loop vs strconv/Builder gp-json-marshal-hot — measured, still hint gp-make-hot — make([]byte) each iter vs reuse / single slice gp-os-open-hot — measured, still hint gp-reflect-hot — measured, still hint gp-regexp-compile-hot — measured, still hint gp-string-plus-hot — string += vs strings.Builder gp-time-now-hot — measured, still hint

gp-defer-in-loop — renamed 2026-10-27 (Asia/Shanghai)gp-fmt-in-loop — renamed 2026-10-27 (Asia/Shanghai)gp-json-marshal-in-loop — renamed 2026-10-27 (Asia/Shanghai)gp-make-in-loop — renamed 2026-10-27 (Asia/Shanghai)gp-os-open-in-loop — renamed 2026-10-27 (Asia/Shanghai)gp-reflect-in-loop — renamed 2026-10-27 (Asia/Shanghai)gp-regexp-compile-in-loop — renamed 2026-10-27 (Asia/Shanghai)gp-string-plus-in-loop — renamed 2026-10-27 (Asia/Shanghai)gp-time-now-in-loop — renamed 2026-10-27 (Asia/Shanghai)gp-time-parse-in-loop gp-time-parse-in-loop — removed 2026-10-23 (Asia/Shanghai)

Project

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

LanguagesGoEvidence_removed

gp-time-parse-in-loop

Removed. See gp-time-parse-in-loop.REMOVED.md. The slug is not reused.

gp-time-now-in-loop — renamed 2026-10-27 (Asia/Shanghai)

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gp-time-parse-in-loop — removed 2026-10-23 (Asia/Shanghai)

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