Backports for beta (#2764)

* v1.3.9

* Block import optimization (#2748)

* Block import optimization

* whitespace

[ci:none]

* Don't add empty accounts to bloom (#2753)

* Incrementally calculate verification queue heap size (#2749)

* incrementally calculate queue heap size

* query the correct queue sizes

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 description = "Ethcore client."
 name = "parity"
-version = "1.3.8"
+version = "1.3.9"
 license = "GPL-3.0"
 authors = ["Ethcore <admin@ethcore.io>"]
 build = "build.rs"

ethcore/src/account.rs

@@ -288,6 +288,15 @@ impl Account {
 	/// Determine whether there are any un-`commit()`-ed storage-setting operations.
 	pub fn storage_is_clean(&self) -> bool { self.storage_changes.is_empty() }
 
+	/// Check if account has zero nonce, balance, no code and no storage.
+	pub fn is_empty(&self) -> bool {
+		self.storage_changes.is_empty() &&
+		self.balance.is_zero() &&
+		self.nonce.is_zero() &&
+		self.storage_root == SHA3_NULL_RLP &&
+		self.code_hash == SHA3_EMPTY
+	}
+
 	#[cfg(test)]
 	/// return the storage root associated with this account or None if it has been altered via the overlay.
 	pub fn storage_root(&self) -> Option<&H256> { if self.storage_is_clean() {Some(&self.storage_root)} else {None} }