net/http: enhance cloneMultipartForm by initializing Value with File length

1911860538 · 1911860538 · commit a9683ba9a7cb · 2024-10-20T13:09:04.000+08:00
diff --git a/src/net/http/clone.go b/src/net/http/clone.go
@@ -68,7 +68,7 @@ func cloneMultipartForm(f *multipart.Form) *multipart.Form {
 		Value: (map[string][]string)(Header(f.Value).Clone()),
 	}
 	if f.File != nil {
-		m := make(map[string][]*multipart.FileHeader)
+		m := make(map[string][]*multipart.FileHeader, len(f.File))
 		for k, vv := range f.File {
 			vv2 := make([]*multipart.FileHeader, len(vv))
 			for i, v := range vv {

Original file line number	Diff line number	Diff line change
`@@ -68,7 +68,7 @@ func cloneMultipartForm(f multipart.Form) multipart.Form {`
`68`	`68`	`Value: (map[string][]string)(Header(f.Value).Clone()),`
`69`	`69`	`}`
`70`	`70`	`if f.File != nil {`
`71`		`- m := make(map[string][]*multipart.FileHeader)`
	`71`	`+ m := make(map[string][]*multipart.FileHeader, len(f.File))`
`72`	`72`	`for k, vv := range f.File {`
`73`	`73`	`vv2 := make([]*multipart.FileHeader, len(vv))`
`74`	`74`	`for i, v := range vv {`