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authorFelix Lange <fjl@twurst.com>2015-06-25 20:46:44 +0800
committerJeffrey Wilcke <geffobscura@gmail.com>2015-06-30 00:51:48 +0800
commit0b22ad99c18b6aaa77afc32113c308f12a07e843 (patch)
tree5ec59df9a5ab0f0df247ca8dfdf51404ae224b77 /core
parenta8889b092bfb2a1b61733883caf11e07eb072d69 (diff)
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core: optimize IntrinsicGas
Diffstat (limited to 'core')
-rw-r--r--core/state_transition.go17
1 files changed, 12 insertions, 5 deletions
diff --git a/core/state_transition.go b/core/state_transition.go
index 2c8770cbe..5844ad3c8 100644
--- a/core/state_transition.go
+++ b/core/state_transition.go
@@ -77,12 +77,19 @@ func MessageGasValue(msg Message) *big.Int {
// with the given data.
func IntrinsicGas(data []byte) *big.Int {
igas := new(big.Int).Set(params.TxGas)
- for _, byt := range data {
- if byt != 0 {
- igas.Add(igas, params.TxDataNonZeroGas)
- } else {
- igas.Add(igas, params.TxDataZeroGas)
+ if len(data) > 0 {
+ var nz int64
+ for _, byt := range data {
+ if byt != 0 {
+ nz++
+ }
}
+ m := big.NewInt(nz)
+ m.Mul(m, params.TxDataNonZeroGas)
+ igas.Add(igas, m)
+ m.SetInt64(int64(len(data)) - nz)
+ m.Mul(m, params.TxDataZeroGas)
+ igas.Add(igas, m)
}
return igas
}