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V2EX / 2026-10-28

[分享创造] [开源] ip2geo：零依赖的 Go IP 归属地查询库， IPv4 查询比 geoip2-golang 快 14～ 58 倍

GitHub： https://github.com/haxqer/ip2geo 写这个库的起因很简单：服务里用 geoip2-golang 查 IP 归属地，profile 一看，单次 City() 要 1.7µs 左右，大部分时间花在解码 mmdb 的数据结构上。而我其实只需要国家 / 省份 / 城市 / 经纬度 / 时区这几个字段。 于是做了 ip2geo：把 MaxMind GeoIP2 / GeoLite2 City （或 DB-IP ）的 .mmdb 一次性转成紧凑的 .geoc 文件，之后直接在它上面查 IPv4 / IPv6 。 性能 Apple M3 单核，500 万个随机 IPv4 ，5 次取中位数： reader ns / 次 吞吐 相对 City() geoip2-golang City() 1768 0.6 M/s 1× geoip2-golang Country() 1121 0.9 M/s 1.6× ip2geo city profile 119 8.4 M/s 14.5× ip2geo country profile 30.5 32.8 M/s 58×

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Source page screenshot: [分享创造] [开源] ip2geo：零依赖的 Go IP 归属地查询库， IPv4 查询比 geoip2-golang 快 14～ 58 倍
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Source record

Source
V2EX
Published
2026-10-28 11:34:53 UTC
First discovered
2026-10-28 15:00:34.151Z
Last collected
2026-10-28 15:00:34.151Z
Author
haxqer
Topic
Developer tools
Classification
Open-source projects & tools
Evidence level
E1 · source record; conclusions unverified

Research analysis

Rule-based research guidance derived from the source record. Audience and commercial demand require validation.

Project record

Source account: GitHub： https://github.com/haxqer/ip2geo 写这个库的起因很简单：服务里用 geoip2-golang 查 IP 归属地，profile 一看，单次 City() 要 1.7µs 左右，大部分时间花在解码 mmdb 的数据结构上。而我其实只需要国家 / 省份 / 城市 / 经纬度 / 时区这几个字段。 于是做了 ip2geo：把 MaxMind GeoIP2 / GeoLite2 City （或 DB-IP ）的 .mmdb 一次性转成紧凑的 .geoc 文件，之后直接在它上面查 IPv4 / IPv6 。 性能 Apple M3 单核，500 万个随机 IPv4 ，5 次取中位数： reader ns / 次 吞吐 相对 City() geoip2-golang City() 1768 0.6 M/s 1× geoip2-golang Country() 1121 0.9 M/s 1.6× ip2geo city profile 119 8.4 M/s 14.5× ip2geo country profile 30.5 32.8 M/s 58×

Observed adoption & comparisons

Recent records to compare: “astral-sh/ruff” (GitHub Trending, Nov 6, 2026); “microsoft/vscode” (GitHub Trending, Nov 6, 2026). Shared themes are navigation hints; they have not been verified as the same need or independent corroboration.

Adoption decision

Evaluate it against the tool or manual workflow it would replace. The stored record supports discovery; it does not yet establish reliability, lower operating cost or commercial adoption.

Unverified requirements

Not verified: license permissions, required hardware, installation steps, maintenance status and a representative task with its failure cases.

Next test

Choose one real task and a current alternative. Record the commit, environment, input, output, elapsed time and failure behavior; retain the result before recommending adoption.