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Avoid frequent string2bytes conversions (#20940)

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Fix #20939
This commit is contained in:
Jason Song 2022-08-24 19:50:13 +08:00 committed by GitHub
parent 9e0c43777e
commit 15b189b570
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 8 additions and 7 deletions
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15
modules/charset/escape_stream.go
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@ -50,6 +50,7 @@ func (e *escapeStreamer) Text(data string) error {
_, _ = sb.WriteString(data[:len(UTF8BOM)])
pos = len(UTF8BOM)
}
dataBytes := []byte(data)
for pos < len(data) {
nextIdxs := defaultWordRegexp.FindStringIndex(data[pos:])
if nextIdxs == nil {
@ -64,18 +65,18 @@ func (e *escapeStreamer) Text(data string) error {
positions := make([]int, 0, next-until+1)
for pos < until {
r, sz := utf8.DecodeRune([]byte(data)[pos:])
r, sz := utf8.DecodeRune(dataBytes[pos:])
positions = positions[:0]
positions = append(positions, pos, pos+sz)
types, confusables, _ := e.runeTypes(r)
if err := e.handleRunes(data, []rune{r}, positions, types, confusables, sb); err != nil {
if err := e.handleRunes(dataBytes, []rune{r}, positions, types, confusables, sb); err != nil {
return err
}
pos += sz
}
for i := pos; i < next; {
r, sz := utf8.DecodeRune([]byte(data)[i:])
r, sz := utf8.DecodeRune(dataBytes[i:])
runes = append(runes, r)
positions = append(positions, i)
i += sz
@ -83,11 +84,11 @@ func (e *escapeStreamer) Text(data string) error {
positions = append(positions, next)
types, confusables, runeCounts := e.runeTypes(runes...)
if runeCounts.needsEscape() {
if err := e.handleRunes(data, runes, positions, types, confusables, sb); err != nil {
if err := e.handleRunes(dataBytes, runes, positions, types, confusables, sb); err != nil {
return err
}
} else {
_, _ = sb.Write([]byte(data)[pos:next])
_, _ = sb.Write(dataBytes[pos:next])
}
pos = next
}
@ -99,7 +100,7 @@ func (e *escapeStreamer) Text(data string) error {
return nil
}
func (e *escapeStreamer) handleRunes(data string, runes []rune, positions []int, types []runeType, confusables []rune, sb *strings.Builder) error {
func (e *escapeStreamer) handleRunes(data []byte, runes []rune, positions []int, types []runeType, confusables []rune, sb *strings.Builder) error {
for i, r := range runes {
switch types[i] {
case brokenRuneType:
@ -111,7 +112,7 @@ func (e *escapeStreamer) handleRunes(data string, runes []rune, positions []int,
}
end := positions[i+1]
start := positions[i]
if err := e.brokenRune([]byte(data)[start:end]); err != nil {
if err := e.brokenRune(data[start:end]); err != nil {
return err
}
case ambiguousRuneType: