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Improve performance of Abs() and Round() (#240)

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Denis 2021-09-09 14:03:13 +03:00 committed by GitHub
parent cc4584f0a5
commit 483a047db9
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1 changed files with 6 additions and 0 deletions
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6
decimal.go
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@ -457,6 +457,9 @@ func (d Decimal) rescale(exp int32) Decimal {
// Abs returns the absolute value of the decimal. // Abs returns the absolute value of the decimal.
func (d Decimal) Abs() Decimal { func (d Decimal) Abs() Decimal {
if !d.IsNegative() {
return d
}
d.ensureInitialized() d.ensureInitialized()
d2Value := new(big.Int).Abs(d.value) d2Value := new(big.Int).Abs(d.value)
return Decimal{ return Decimal{
@ -879,6 +882,9 @@ func (d Decimal) StringFixedCash(interval uint8) string {
// NewFromFloat(545).Round(-1).String() // output: "550" // NewFromFloat(545).Round(-1).String() // output: "550"
// //
func (d Decimal) Round(places int32) Decimal { func (d Decimal) Round(places int32) Decimal {
if d.exp == -places {
return d
}
// truncate to places + 1 // truncate to places + 1
ret := d.rescale(-places - 1) ret := d.rescale(-places - 1)