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improve slice copying

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This commit is contained in:
c9s 2021-01-25 14:20:56 +08:00
parent b99c01a03f
commit ca71c81284
1 changed files with 3 additions and 2 deletions
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5
pkg/types/orderbook.go
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@ -38,8 +38,9 @@ func (slice PriceVolumeSlice) Trim() (pvs PriceVolumeSlice) {
} }
func (slice PriceVolumeSlice) Copy() PriceVolumeSlice { func (slice PriceVolumeSlice) Copy() PriceVolumeSlice {
// this is faster than make (however it's only for simple types) var s = make(PriceVolumeSlice, len(slice), len(slice))
return append(slice[:0:0], slice...) copy(s, slice)
return s
} }
func (slice PriceVolumeSlice) First() (PriceVolume, bool) { func (slice PriceVolumeSlice) First() (PriceVolume, bool) {