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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// This benchmark tests text/template throughput,
// converting a large data structure with a simple template.
package go1
import (
"bytes"
"io"
"strings"
"testing"
"text/template"
)
// After removing \t and \n this generates identical output to
// json.Marshal, making it easy to test for correctness.
const tmplText = `
{
"tree":{{template "node" .Tree}},
"username":"{{.Username}}"
}
{{define "node"}}
{
"name":"{{.Name}}",
"kids":[
{{range $i, $k := .Kids}}
{{if $i}}
,
{{end}}
{{template "node" $k}}
{{end}}
],
"cl_weight":{{.CLWeight}},
"touches":{{.Touches}},
"min_t":{{.MinT}},
"max_t":{{.MaxT}},
"mean_t":{{.MeanT}}
}
{{end}}
`
func stripTabNL(r rune) rune {
if r == '\t' || r == '\n' {
return -1
}
return r
}
func makeTemplate(jsonbytes []byte, jsondata *JSONResponse) *template.Template {
tmpl := template.Must(template.New("main").Parse(strings.Map(stripTabNL, tmplText)))
var buf bytes.Buffer
if err := tmpl.Execute(&buf, &jsondata); err != nil {
panic(err)
}
if !bytes.Equal(buf.Bytes(), jsonbytes) {
println(buf.Len(), len(jsonbytes))
panic("wrong output")
}
return tmpl
}
func tmplexec(tmpl *template.Template, jsondata *JSONResponse) {
if err := tmpl.Execute(io.Discard, jsondata); err != nil {
panic(err)
}
}
func BenchmarkTemplate(b *testing.B) {
jsonbytes := makeJsonBytes()
jsondata := makeJsonData(jsonbytes)
tmpl := makeTemplate(jsonbytes, jsondata)
b.ResetTimer()
b.SetBytes(int64(len(jsonbytes)))
for i := 0; i < b.N; i++ {
tmplexec(tmpl, jsondata)
}
}
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