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Add a cache for lexers.Get

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```
name                            old time/op    new time/op    delta
Codeblocks/Default-10              152ms ±11%      12ms ± 1%  -92.44%  (p=0.029 n=4+4)
Codeblocks/Hook_no_higlight-10     142ms ± 0%       7ms ± 0%  -95.36%  (p=0.029 n=4+4)

name                            old alloc/op   new alloc/op   delta
Codeblocks/Default-10             11.9MB ± 0%    11.7MB ± 0%   -1.59%  (p=0.029 n=4+4)
Codeblocks/Hook_no_higlight-10    4.62MB ± 1%    4.43MB ± 0%   -4.08%  (p=0.029 n=4+4)

name                            old allocs/op  new allocs/op  delta
Codeblocks/Default-10               209k ± 0%      209k ± 0%   -0.03%  (p=0.029 n=4+4)
Codeblocks/Hook_no_higlight-10     68.4k ± 0%     68.3k ± 0%   -0.06%  (p=0.029 n=4+4)

```
This commit is contained in:
Bjørn Erik Pedersen
2022-11-24 12:13:19 +01:00
parent 34d1150d92
commit 7855b47f07
5 changed files with 58 additions and 7 deletions
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3
markup/highlight/highlight.go
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@@ -28,6 +28,7 @@ import (
"github.com/gohugoio/hugo/common/text"
"github.com/gohugoio/hugo/identity"
"github.com/gohugoio/hugo/markup/converter/hooks"
"github.com/gohugoio/hugo/markup/highlight/chromalexers"
"github.com/gohugoio/hugo/markup/internal/attributes"
)
@@ -167,7 +168,7 @@ func (h HightlightResult) Inner() template.HTML {
func highlight(fw hugio.FlexiWriter, code, lang string, attributes []attributes.Attribute, cfg Config) (int, int, error) {
var lexer chroma.Lexer
if lang != "" {
lexer = lexers.Get(lang)
lexer = chromalexers.Get(lang)
}
if lexer == nil && (cfg.GuessSyntax && !cfg.NoHl) {