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Improve rendering time

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50% speedup.  Fix #91

to run the benchmark:

		go test -test.run=NONE -bench=".*" -test.benchmem=true ./transform/ > new.txt

to compare the results:

		/usr/local/go/misc/benchcmp baseline.txt new.txt

Speedup and memory improvements

		benchmark             old ns/op    new ns/op    delta
		BenchmarkChain           101219        50453  -50.15%
		BenchmarkTransform        51625        45531  -11.80%

		benchmark            old allocs   new allocs    delta
		BenchmarkChain              222          103  -53.60%
		BenchmarkTransform          135          106  -21.48%

		benchmark             old bytes    new bytes    delta
		BenchmarkChain            23919        10998  -54.02%
		BenchmarkTransform        11858        10665  -10.06%
This commit is contained in:
Noah Campbell 2013-10-31 22:14:11 -07:00
parent f4cb8e1688
commit 9af47f07d3
9 changed files with 58 additions and 115 deletions
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29
transform/absurl.go
View file

@ -2,38 +2,28 @@ package transform
import (
htmltran "code.google.com/p/go-html-transform/html/transform"
"io"
"net/url"
)
type AbsURL struct {
BaseURL string
}
func AbsURL(absURL string) (trs []*htmltran.Transform, err error) {
var baseURL *url.URL
func (t *AbsURL) Apply(w io.Writer, r io.Reader) (err error) {
var tr *htmltran.Transformer
if tr, err = htmltran.NewFromReader(r); err != nil {
if baseURL, err = url.Parse(absURL); err != nil {
return
}
if err = t.absUrlify(tr, elattr{"a", "href"}, elattr{"script", "src"}); err != nil {
if trs, err = absUrlify(baseURL, elattr{"a", "href"}, elattr{"script", "src"}); err != nil {
return
}
return tr.Render(w)
return
}
type elattr struct {
tag, attr string
}
func (t *AbsURL) absUrlify(tr *htmltran.Transformer, selectors ...elattr) (err error) {
var baseURL, inURL *url.URL
if baseURL, err = url.Parse(t.BaseURL); err != nil {
return
}
func absUrlify(baseURL *url.URL, selectors ...elattr) (trs []*htmltran.Transform, err error) {
var inURL *url.URL
replace := func(in string) string {
if inURL, err = url.Parse(in); err != nil {
@ -46,9 +36,8 @@ func (t *AbsURL) absUrlify(tr *htmltran.Transformer, selectors ...elattr) (err e
}
for _, el := range selectors {
if err = tr.Apply(htmltran.TransformAttrib(el.attr, replace), el.tag); err != nil {
return
}
mt := htmltran.MustTrans(htmltran.TransformAttrib(el.attr, replace), el.tag)
trs = append(trs, mt)
}
return