hugo/transform/absurl.go
Noah Campbell 9af47f07d3 Improve rendering time
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%
2013-11-01 09:59:57 -07:00

48 lines
1 KiB
Go

package transform
import (
htmltran "code.google.com/p/go-html-transform/html/transform"
"net/url"
)
func AbsURL(absURL string) (trs []*htmltran.Transform, err error) {
var baseURL *url.URL
if baseURL, err = url.Parse(absURL); err != nil {
return
}
if trs, err = absUrlify(baseURL, elattr{"a", "href"}, elattr{"script", "src"}); err != nil {
return
}
return
}
type elattr struct {
tag, attr string
}
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 {
return in + "?"
}
if fragmentOnly(inURL) {
return in
}
return baseURL.ResolveReference(inURL).String()
}
for _, el := range selectors {
mt := htmltran.MustTrans(htmltran.TransformAttrib(el.attr, replace), el.tag)
trs = append(trs, mt)
}
return
}
func fragmentOnly(u *url.URL) bool {
return u.Fragment != "" && u.Scheme == "" && u.Opaque == "" && u.User == nil && u.Host == "" && u.Path == "" && u.Path == "" && u.RawQuery == ""
}