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Use xxHash for the change detector

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Much faster compared to MD5:

```
name          old time/op    new time/op    delta
HashingFs-10    21.3µs ± 2%     3.2µs ±17%  -84.96%  (p=0.029 n=4+4)

name          old alloc/op   new alloc/op   delta
HashingFs-10    12.9kB ± 0%    12.8kB ± 1%   -1.31%  (p=0.029 n=4+4)

name          old allocs/op  new allocs/op  delta
HashingFs-10      10.0 ± 0%       7.0 ± 0%  -30.00%  (p=0.029 n=4+4)
```

Updates #12643
This commit is contained in:
Bjørn Erik Pedersen
2024-07-06 16:06:24 +02:00
parent 0ee2610d7c
commit fb8909d5b0
3 changed files with 53 additions and 30 deletions
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16
commands/server.go
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@@ -162,16 +162,16 @@ type dynamicEvents struct {
type fileChangeDetector struct {
sync.Mutex
current map[string]string
prev map[string]string
current map[string]uint64
prev map[string]uint64
irrelevantRe *regexp.Regexp
}
func (f *fileChangeDetector) OnFileClose(name, md5sum string) {
func (f *fileChangeDetector) OnFileClose(name string, checksum uint64) {
f.Lock()
defer f.Unlock()
f.current[name] = md5sum
f.current[name] = checksum
}
func (f *fileChangeDetector) PrepareNew() {
@@ -183,16 +183,16 @@ func (f *fileChangeDetector) PrepareNew() {
defer f.Unlock()
if f.current == nil {
f.current = make(map[string]string)
f.prev = make(map[string]string)
f.current = make(map[string]uint64)
f.prev = make(map[string]uint64)
return
}
f.prev = make(map[string]string)
f.prev = make(map[string]uint64)
for k, v := range f.current {
f.prev[k] = v
}
f.current = make(map[string]string)
f.current = make(map[string]uint64)
}
func (f *fileChangeDetector) changed() []string {