perf(serverHandler): use slice struct for proxy handler

Slice is about more than 15x faster than map.

Author: marjune163

src/serverHandler/main.go

@@ -14,8 +14,8 @@ type handler struct {
 	root      string
 	urlPrefix string
 
-	fallbackProxies map[string]http.Handler
-	alwaysProxies   map[string]http.Handler
+	fallbackProxies proxyHandlers
+	alwaysProxies   proxyHandlers
 	aliases         aliases
 
 	globalUpload bool
@@ -134,8 +134,8 @@ func NewHandler(
 	urlPrefix string,
 	p *param.Param,
 	users user.Users,
-	fallbackProxies map[string]http.Handler,
-	alwaysProxies map[string]http.Handler,
+	fallbackProxiesMap map[string]http.Handler,
+	alwaysProxiesMap map[string]http.Handler,
 	template *template.Template,
 	logger *serverLog.Logger,
 	errHandler *serverErrHandler.ErrHandler,
@@ -145,6 +145,16 @@ func NewHandler(
 		aliases = append(aliases, &alias{urlPath, fsPath})
 	}
 
+	fallbackProxies := proxyHandlers{}
+	for urlPath, handler := range fallbackProxiesMap {
+		fallbackProxies = append(fallbackProxies, &proxyHandler{urlPath, handler})
+	}
+
+	alwaysProxies := proxyHandlers{}
+	for urlPath, handler := range alwaysProxiesMap {
+		alwaysProxies = append(alwaysProxies, &proxyHandler{urlPath, handler})
+	}
+
 	h := &handler{
 		root:      root,
 		urlPrefix: urlPrefix,

src/serverHandler/proxy.go

@@ -5,7 +5,14 @@ import (
 	"net/http"
 )
 
-func getProxyHandler(r *http.Request, proxies map[string]http.Handler) http.Handler {
+type proxyHandler struct {
+	urlPath string
+	handler http.Handler
+}
+
+type proxyHandlers []*proxyHandler
+
+func getProxyHandler(r *http.Request, proxies proxyHandlers) http.Handler {
 	if len(proxies) == 0 {
 		return nil
 	}
@@ -14,7 +21,10 @@ func getProxyHandler(r *http.Request, proxies map[string]http.Handler) http.Hand
 	var proxyHandler http.Handler = nil
 
 	requestUrlPath := r.RequestURI
-	for urlPath, handler := range proxies {
+	for _, proxy := range proxies {
+		urlPath := proxy.urlPath
+		handler := proxy.handler
+
 		if len(requestUrlPath) < len(urlPath) || !util.HasUrlPrefixDir(requestUrlPath, urlPath) {
 			continue
 		}