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highlight: Avoid making unnecessary allocation

Browse source 
Avoid creating a local copy of the highlight configuration when no
options are passed.

Benchmarks of building the docs site:

name        old time/op    new time/op    delta
DocsSite-2     1.94s ± 4%     1.93s ± 4%    ~     (p=0.841 n=5+5)

name        old alloc/op   new alloc/op   delta
DocsSite-2     666MB ± 1%     656MB ± 0%  -1.48%  (p=0.008 n=5+5)

name        old allocs/op  new allocs/op  delta
DocsSite-2     8.85M ± 0%     8.76M ± 0%  -1.04%  (p=0.029 n=4+4)
This commit is contained in:
Cameron Moore 2020-10-16 13:27:09 -05:00 committed by Bjørn Erik Pedersen
parent 837e084bbe
commit 14bce18a6c
1 changed files with 8 additions and 5 deletions
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7
markup/highlight/highlight.go
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@ -37,12 +37,15 @@ type Highlighter struct {
} }
func (h Highlighter) Highlight(code, lang, optsStr string) (string, error) { func (h Highlighter) Highlight(code, lang, optsStr string) (string, error) {
if optsStr == "" {
return highlight(code, lang, h.cfg)
}
cfg := h.cfg cfg := h.cfg
if optsStr != "" {
if err := applyOptionsFromString(optsStr, &cfg); err != nil { if err := applyOptionsFromString(optsStr, &cfg); err != nil {
return "", err return "", err
} }
}
return highlight(code, lang, cfg) return highlight(code, lang, cfg)
} }