core, core/vm: state improvements and tx pool speed up

Removed full tx validation during state transitions

core/vm/context.go

@@ -26,25 +26,16 @@ type Context struct {
 	Args []byte
 }
 
-var dests destinations
-
-func init() {
-	dests = make(destinations)
-}
-
 // Create a new context for the given data items.
 func NewContext(caller ContextRef, object ContextRef, value, gas, price *big.Int) *Context {
 	c := &Context{caller: caller, self: object, Args: nil}
 
-	/*
-		if parent, ok := caller.(*Context); ok {
-			// Reuse JUMPDEST analysis from parent context if available.
-			c.jumpdests = parent.jumpdests
-		} else {
-			c.jumpdests = make(destinations)
-		}
-	*/
-	c.jumpdests = dests
+	if parent, ok := caller.(*Context); ok {
+		// Reuse JUMPDEST analysis from parent context if available.
+		c.jumpdests = parent.jumpdests
+	} else {
+		c.jumpdests = make(destinations)
+	}
 
 	// Gas should be a pointer so it can safely be reduced through the run
 	// This pointer will be off the state transition