Use bufferpool in Asciidoc handler

Author: bep

helpers/content.go

@@ -23,6 +23,8 @@ import (
 	"os/exec"
 	"unicode/utf8"
 
+	"github.com/spf13/hugo/bufferpool"
+
 	"github.com/miekg/mmark"
 	"github.com/mitchellh/mapstructure"
 	"github.com/russross/blackfriday"
@@ -473,8 +475,9 @@ func getAsciidocContent(content []byte) []byte {
 	jww.INFO.Println("Rendering with", path, "...")
 	cmd := exec.Command(path, "--no-header-footer", "--safe", "-")
 	cmd.Stdin = bytes.NewReader(cleanContent)
-	var out bytes.Buffer
-	cmd.Stdout = &out
+	out := bufferpool.GetBuffer()
+	defer bufferpool.PutBuffer(out)
+	cmd.Stdout = out
 	if err := cmd.Run(); err != nil {
 		jww.ERROR.Println(err)
 	}