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bytes: narrow the search of IndexByte in Index

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This commit is contained in:
Andy Pan 2020-03-22 10:51:21 +08:00
parent 4d5bb9c609
commit 8576f1931d
1 changed files with 4 additions and 4 deletions
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8
src/bytes/bytes.go
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@ -1019,11 +1019,11 @@ func Index(s, sep []byte) int {
if s[i] != c0 {
// IndexByte is faster than bytealg.Index, so use it as long as
// we're not getting lots of false positives.
o := IndexByte(s[i:t], c0)
o := IndexByte(s[i+1:t], c0)
if o < 0 {
return -1
}
i += o
i += o + 1
}
if s[i+1] == c1 && Equal(s[i:i+n], sep) {
return i
@ -1048,11 +1048,11 @@ func Index(s, sep []byte) int {
t := len(s) - n + 1
for i < t {
if s[i] != c0 {
o := IndexByte(s[i:t], c0)
o := IndexByte(s[i+1:t], c0)
if o < 0 {
break
}
i += o
i += o + 1
}
if s[i+1] == c1 && Equal(s[i:i+n], sep) {
return i