core: add global signature cache and improve concurrency (#42)

From the go trace result, the bottleneck hides in the lock of
StoreTxCache. To improve this, we update the cache in a batched fassion.

1 files changed, 1 insertions, 1 deletions

diff --git a/core/blockchain.go b/core/blockchain.go
index eec1a6879..ea1c9a210 100644
--- a/core/blockchain.go
+++ b/core/blockchain.go
@@ -268,7 +268,7 @@ func (bc *BlockChain) AddConfirmedBlock(block *coreTypes.Block) error {
 	if err != nil {
 		return err
 	}
-	_, err = transactions.TouchSenders(types.MakeSigner(bc.Config(), new(big.Int)))
+	_, err = types.GlobalSigCache.Add(types.NewEIP155Signer(bc.Config().ChainID), transactions)
 	if err != nil {
 		return err
 	}