diff options
author | Felix Lange <fjl@users.noreply.github.com> | 2017-02-28 22:09:11 +0800 |
---|---|---|
committer | Jeffrey Wilcke <jeffrey@ethereum.org> | 2017-02-28 22:09:11 +0800 |
commit | 5f7826270c9e87509fd7731ec64953a5e4761de0 (patch) | |
tree | 0d3187b115a0e10afcce1bb38ed8ba977d8bf44f /core/state/state_object.go | |
parent | d4f60d362b8fcf82db1accf89c146a2a71375841 (diff) | |
download | dexon-5f7826270c9e87509fd7731ec64953a5e4761de0.tar dexon-5f7826270c9e87509fd7731ec64953a5e4761de0.tar.gz dexon-5f7826270c9e87509fd7731ec64953a5e4761de0.tar.bz2 dexon-5f7826270c9e87509fd7731ec64953a5e4761de0.tar.lz dexon-5f7826270c9e87509fd7731ec64953a5e4761de0.tar.xz dexon-5f7826270c9e87509fd7731ec64953a5e4761de0.tar.zst dexon-5f7826270c9e87509fd7731ec64953a5e4761de0.zip |
all: unify big.Int zero checks, use common/math in more places (#3716)
* common/math: optimize PaddedBigBytes, use it more
name old time/op new time/op delta
PaddedBigBytes-8 71.1ns ± 5% 46.1ns ± 1% -35.15% (p=0.000 n=20+19)
name old alloc/op new alloc/op delta
PaddedBigBytes-8 48.0B ± 0% 32.0B ± 0% -33.33% (p=0.000 n=20+20)
* all: unify big.Int zero checks
Various checks were in use. This commit replaces them all with Int.Sign,
which is cheaper and less code.
eg templates:
func before(x *big.Int) bool { return x.BitLen() == 0 }
func after(x *big.Int) bool { return x.Sign() == 0 }
func before(x *big.Int) bool { return x.BitLen() > 0 }
func after(x *big.Int) bool { return x.Sign() != 0 }
func before(x *big.Int) int { return x.Cmp(common.Big0) }
func after(x *big.Int) int { return x.Sign() }
* common/math, crypto/secp256k1: make ReadBits public in package math
Diffstat (limited to 'core/state/state_object.go')
-rw-r--r-- | core/state/state_object.go | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/core/state/state_object.go b/core/state/state_object.go index ebb103806..17726dd0c 100644 --- a/core/state/state_object.go +++ b/core/state/state_object.go @@ -93,7 +93,7 @@ type stateObject struct { // empty returns whether the account is considered empty. func (s *stateObject) empty() bool { - return s.data.Nonce == 0 && s.data.Balance.BitLen() == 0 && bytes.Equal(s.data.CodeHash, emptyCodeHash) + return s.data.Nonce == 0 && s.data.Balance.Sign() == 0 && bytes.Equal(s.data.CodeHash, emptyCodeHash) } // Account is the Ethereum consensus representation of accounts. @@ -243,7 +243,7 @@ func (self *stateObject) CommitTrie(db trie.Database, dbw trie.DatabaseWriter) e func (c *stateObject) AddBalance(amount *big.Int) { // EIP158: We must check emptiness for the objects such that the account // clearing (0,0,0 objects) can take effect. - if amount.Cmp(common.Big0) == 0 { + if amount.Sign() == 0 { if c.empty() { c.touch() } @@ -260,7 +260,7 @@ func (c *stateObject) AddBalance(amount *big.Int) { // SubBalance removes amount from c's balance. // It is used to remove funds from the origin account of a transfer. func (c *stateObject) SubBalance(amount *big.Int) { - if amount.Cmp(common.Big0) == 0 { + if amount.Sign() == 0 { return } c.SetBalance(new(big.Int).Sub(c.Balance(), amount)) |