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perf: Speedup DecCoin.Sort() when coins is of length 1 #18888

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Dec 26, 2023
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perf: Speedup DecCoin.Sort() when coins is of length 1 #18888

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perf: Speedup DecCoin.Sort() when coins is of length 1
DongLieu Dec 26, 2023
b7f60d8
changelog
DongLieu Dec 26, 2023
297fb33
minor
DongLieu Dec 26, 2023
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1 change: 1 addition & 0 deletions CHANGELOG.md
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Expand Up @@ -54,6 +54,7 @@ Ref: https://keepachangelog.com/en/1.0.0/

### Improvements

* (types) [#18875](https://github.com/cosmos/cosmos-sdk/pull/18888) Speedup DecCoin.Sort() if len(coins) <= 1
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* (types) [#18875](https://github.com/cosmos/cosmos-sdk/pull/18875) Speedup coins.Sort() if len(coins) <= 1
* (client/keys) [#18745](https://github.com/cosmos/cosmos-sdk/pull/18745) Improve `<appd> keys export` and `<appd> keys mnemonic` by adding --yes option to skip interactive confirmation.
* (client/keys) [#18743](https://github.com/cosmos/cosmos-sdk/pull/18743) Improve `<appd> keys add -i` by hiding inputting of bip39 passphrase.
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7 changes: 6 additions & 1 deletion types/dec_coin.go
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Expand Up @@ -615,7 +615,12 @@ func (coins DecCoins) Swap(i, j int) { coins[i], coins[j] = coins[j], coins[i] }

// Sort is a helper function to sort the set of decimal coins in-place.
func (coins DecCoins) Sort() DecCoins {
sort.Sort(coins)
// sort.Sort(coins) does a costly runtime copy as part of `runtime.convTSlice`
// So we avoid this heap allocation if len(coins) <= 1. In the future, we should hopefully find
// a strategy to always avoid this.
if len(coins) > 1 {
sort.Sort(coins)
}
return coins
}

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