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types/views: optimize slices contains under some conditions (#11449)

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In control there are conditions where the leaf functions are not being
optimized away (i.e. At is not inlined), resulting in undesirable time
spent copying during SliceContains. This optimization is likely
irrelevant to simpler code or smaller structures.

Updates #optimization

Signed-off-by: James Tucker <james@tailscale.com>
This commit is contained in:
James Tucker 2024-03-18 16:19:16 -07:00 committed by GitHub
parent d2ccfa4edd
commit 7fe4cbbaf3
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GPG Key ID: B5690EEEBB952194
1 changed files with 6 additions and 6 deletions
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12
types/views/views.go
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@ -274,8 +274,8 @@ func (v Slice[T]) IndexFunc(f func(T) bool) int {
// //
// As it runs in O(n) time, use with care. // As it runs in O(n) time, use with care.
func (v Slice[T]) ContainsFunc(f func(T) bool) bool { func (v Slice[T]) ContainsFunc(f func(T) bool) bool {
for i := 0; i < v.Len(); i++ { for _, x := range v.ж {
if f(v.At(i)) { if f(x) {
return true return true
} }
} }
@ -286,8 +286,8 @@ func (v Slice[T]) ContainsFunc(f func(T) bool) bool {
// //
// As it runs in O(n) time, use with care. // As it runs in O(n) time, use with care.
func SliceContains[T comparable](v Slice[T], e T) bool { func SliceContains[T comparable](v Slice[T], e T) bool {
for i := 0; i < v.Len(); i++ { for _, x := range v.ж {
if v.At(i) == e { if x == e {
return true return true
} }
} }
@ -296,8 +296,8 @@ func SliceContains[T comparable](v Slice[T], e T) bool {
// SliceContainsFunc reports whether f reports true for any element in v. // SliceContainsFunc reports whether f reports true for any element in v.
func SliceContainsFunc[T any](v Slice[T], f func(T) bool) bool { func SliceContainsFunc[T any](v Slice[T], f func(T) bool) bool {
for i := 0; i < v.Len(); i++ { for _, x := range v.ж {
if f(v.At(i)) { if f(x) {
return true return true
} }
} }