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html/template: micro optimization for isJSType
There is an unnecessary lower operation in isJSType. Simple logic fix can improve tiny performance. name old time/op new time/op delta isJSType-8 152ns ± 0% 58ns ± 7% -61.82% (p=0.001 n=6+8) name old alloc/op new alloc/op delta isJSType-8 32.0B ± 0% 0.0B -100.00% (p=0.000 n=8+8) name old allocs/op new allocs/op delta isJSType-8 1.00 ± 0% 0.00 -100.00% (p=0.000 n=8+8) Change-Id: I281aadf1677d4377920c9649af206381189a27e6 Reviewed-on: https://go-review.googlesource.com/c/go/+/177118 Run-TryBot: Daniel Martí <mvdan@mvdan.cc> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
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@ -383,11 +383,11 @@ func isJSType(mimeType string) bool {
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// https://tools.ietf.org/html/rfc7231#section-3.1.1
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// https://tools.ietf.org/html/rfc4329#section-3
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// https://www.ietf.org/rfc/rfc4627.txt
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mimeType = strings.ToLower(mimeType)
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// discard parameters
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if i := strings.Index(mimeType, ";"); i >= 0 {
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mimeType = mimeType[:i]
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}
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mimeType = strings.ToLower(mimeType)
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mimeType = strings.TrimSpace(mimeType)
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switch mimeType {
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case
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