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bytes: narrow the search of IndexByte in Index

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Change-Id: I5a47b18b64e7f781dcc77440b06de36966e3d01d
GitHub-Last-Rev: 8576f1931d
GitHub-Pull-Request: golang/go#37993
Reviewed-on: https://go-review.googlesource.com/c/go/+/224589
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Andy Pan 2020-03-23 02:51:26 +00:00 • committed by Ian Lance Taylor
parent ab2cc45cc9
commit 1250a324b4
1 changed files with 4 additions and 4 deletions
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8
src/bytes/bytes.go
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@ -1100,11 +1100,11 @@ 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
@ -1129,11 +1129,11 @@ 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