ISUCON5本戦にてスコアトップの18万点でfailしました

import "runtime"

...省略...

runtime.GOMAXPROCS(runtime.NumCPU())

package main

import "net/http"

// 元の各レコード
// ken                 | GET  |            |                          | http://api.five-final.isucon.net:8080/%s
// ken2                | GET  |            |                          | http://api.five-final.isucon.net:8080/
// surname             | GET  |            |                          | http://api.five-final.isucon.net:8081/surname
// givenname           | GET  |            |                          | http://api.five-final.isucon.net:8081/givenname
// tenki               | GET  | param      | zipcode                  | http://api.five-final.isucon.net:8988/
// perfectsec          | GET  | header     | X-PERFECT-SECURITY-TOKEN | https://api.five-final.isucon.net:8443/tokens
// perfectsec_attacked | GET  | header     | X-PERFECT-SECURITY-TOKEN | https://api.five-final.isucon.net:8443/attacked_list

var endpoints = map[string]*Endpoint{
	"ken": &Endpoint{
		"ken", "GET", "", "", "http://api.five-final.isucon.net:8080/%s", http.DefaultClient,
	},
	"ken2": &Endpoint{
		"ken2", "GET", "", "", "http://api.five-final.isucon.net:8080/", http.DefaultClient,
	},
	"surname": &Endpoint{
		"surname", "GET", "", "", "http://api.five-final.isucon.net:8081/surname", http.DefaultClient,
	},
	"givenname": &Endpoint{
		"givenname", "GET", "", "", "http://api.five-final.isucon.net:8081/givenname", http.DefaultClient,
	},
	"tenki": &Endpoint{
		"tenki", "GET", "param", "zipcode", "http://api.five-final.isucon.net:8988/", http.DefaultClient,
	},
	"perfectsec": &Endpoint{
		"perfectsec", "GET", "header", "X-PERFECT-SECURITY-TOKEN", "https://api.five-final.isucon.net:8443/tokens", http.DefaultClient,
	},
	"perfectsec_attacked": &Endpoint{
		"perfectsec_attacked", "GET", "header", "X-PERFECT-SECURITY-TOKEN", "https://api.five-final.isucon.net:8443/attacked_list", http.DefaultClient,
	},
}

type Endpoint struct {
	Service   string
	Method    string
	TokenType string
	TokenKey  string
	URI       string

	client *http.Client
}

//...省略...
	data := make([]Data, 0, len(user.Arg))
	var wg sync.WaitGroup // waitgroupを使って全てのAPI問い合わせ完了をまつ
	m := &sync.Mutex{}    // mutexを使ってdataのappend処理の競合を避ける
	for s, c := range user.Arg {
		service := s
		conf := c
		wg.Add(1)
		go func() {
			defer wg.Done()
			e := endpoints[service]
//...省略...
           d := fetchApi(e.Method, uri, headers, params)
			m.Lock()
			data = append(data, Data{service, d})
			m.Unlock()
		}()
	}
	wg.Wait()

ユーザー情報
Type: string型
Key: user:<userID>
Value: id,email、API問い合わせ情報パラメタのタブ区切り文字列

ログイン用情報
Type: string型
Key: user:pass:<email>:<pass>
Value: ユーザーのid

ユーザーID払い出し用
Type: string
Key: userid
Value: 現在のmax id