Emmanuel T Odeke
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a534a960db
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types: use (*math/big.Int).BitLen() == 0 to check if value is 0 (#8580)
Instead of using len((*math/big.Int).Bytes()) == 0, which expensively
creates a byte slice and marshals a value, on the majority hot path,
instead use the cheaper method .BitLen() to check if 0.
Benchmarking results, just from types:
name old time/op new time/op delta
CoinsAdditionIntersect/sizes:_A_1,_B_1-8 132ns ± 2% 126ns ±13% -4.55% (p=0.050 n=10+10)
CoinsAdditionIntersect/sizes:_A_5,_B_5-8 1.41µs ± 3% 1.41µs ± 2% ~ (p=1.000 n=10+10)
CoinsAdditionIntersect/sizes:_A_5,_B_20-8 2.30µs ± 1% 2.27µs ± 3% ~ (p=0.066 n=10+10)
CoinsAdditionIntersect/sizes:_A_1,_B_1000-8 30.9µs ± 3% 30.7µs ± 1% ~ (p=0.218 n=10+10)
CoinsAdditionIntersect/sizes:_A_2,_B_1000-8 31.4µs ± 3% 30.8µs ± 2% -1.94% (p=0.015 n=10+10)
CoinsAdditionNoIntersect/sizes:_A_1,_B_1-8 116ns ± 1% 114ns ± 4% ~ (p=0.142 n=10+10)
CoinsAdditionNoIntersect/sizes:_A_5,_B_5-8 1.11µs ± 1% 1.08µs ± 3% -2.36% (p=0.003 n=8+10)
CoinsAdditionNoIntersect/sizes:_A_5,_B_20-8 1.85µs ± 2% 1.82µs ± 1% -1.38% (p=0.001 n=10+9)
CoinsAdditionNoIntersect/sizes:_A_1,_B_1000-8 30.7µs ± 1% 30.6µs ± 3% ~ (p=0.393 n=10+10)
CoinsAdditionNoIntersect/sizes:_A_2,_B_1000-8 31.1µs ± 1% 30.7µs ± 2% -1.32% (p=0.015 n=10+10)
CoinsAdditionNoIntersect/sizes:_A_1000,_B_2-8 31.0µs ± 2% 30.7µs ± 2% ~ (p=0.190 n=10+10)
Bech32ifyPubKey-8 28.8µs ± 5% 28.8µs ± 3% ~ (p=0.965 n=10+8)
GetPubKeyFromBech32-8 38.8µs ± 3% 39.4µs ± 2% +1.70% (p=0.013 n=9+10)
ParseCoin-8 16.7µs ± 6% 15.8µs ± 4% -5.21% (p=0.001 n=10+10)
MarshalTo-8 521ns ± 5% 508ns ± 3% -2.56% (p=0.029 n=10+10)
UintMarshal-8 3.10µs ±17% 2.56µs ± 3% -17.45% (p=0.000 n=10+9)
IntMarshal-8 2.52µs ±10% 1.94µs ± 2% -23.10% (p=0.000 n=10+10)
name old alloc/op new alloc/op delta
Bech32ifyPubKey-8 4.02kB ± 0% 4.02kB ± 0% ~ (all equal)
GetPubKeyFromBech32-8 2.48kB ± 0% 2.48kB ± 0% ~ (all equal)
ParseCoin-8 2.21kB ± 0% 2.21kB ± 0% ~ (all equal)
MarshalTo-8 80.0B ± 0% 80.0B ± 0% ~ (all equal)
UintMarshal-8 440B ± 0% 392B ± 0% -10.91% (p=0.000 n=10+10)
IntMarshal-8 216B ± 0% 168B ± 0% -22.22% (p=0.000 n=10+10)
name old allocs/op new allocs/op delta
Bech32ifyPubKey-8 25.0 ± 0% 25.0 ± 0% ~ (all equal)
GetPubKeyFromBech32-8 85.0 ± 0% 85.0 ± 0% ~ (all equal)
ParseCoin-8 71.0 ± 0% 71.0 ± 0% ~ (all equal)
MarshalTo-8 2.00 ± 0% 2.00 ± 0% ~ (all equal)
UintMarshal-8 31.0 ± 0% 25.0 ± 0% -19.35% (p=0.000 n=10+10)
IntMarshal-8 24.0 ± 0% 18.0 ± 0% -25.00% (p=0.000 n=10+10)
name old speed new speed delta
UintMarshal-8 2.27MB/s ±15% 2.75MB/s ± 2% +20.87% (p=0.000 n=10+8)
IntMarshal-8 2.78MB/s ± 9% 3.60MB/s ± 2% +29.69% (p=0.000 n=10+10)
Fixes #8575
Co-authored-by: Alessio Treglia <alessio@tendermint.com>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>
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2021-02-15 10:53:10 +00:00 |
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