feat(async-backing): phase 3 (activate)

runtime/src/lib.rs

@@ -202,7 +202,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 /// up by `pallet_aura` to implement `fn slot_duration()`.
 ///
 /// Change this to adjust the block time.
-pub const MILLISECS_PER_BLOCK: u64 = 12000;
+pub const MILLISECS_PER_BLOCK: u64 = 6000;
 
 // NOTE: Currently it is not possible to change the slot duration after the chain has started.
 //       Attempting to do so will brick block production.
@@ -235,15 +235,15 @@ const AVERAGE_ON_INITIALIZE_RATIO: Perbill = Perbill::from_percent(5);
 /// `Operational` extrinsics.
 const NORMAL_DISPATCH_RATIO: Perbill = Perbill::from_percent(75);
 
-/// We allow for 0.5 of a second of compute with a 12 second average block time.
+/// We allow for 2 seconds of compute with a 6-second average block.
 const MAXIMUM_BLOCK_WEIGHT: Weight = Weight::from_parts(
-	WEIGHT_REF_TIME_PER_SECOND.saturating_div(2),
+	WEIGHT_REF_TIME_PER_SECOND.saturating_mul(2),
 	cumulus_primitives_core::relay_chain::MAX_POV_SIZE as u64,
 );
 
 /// Maximum number of blocks simultaneously accepted by the Runtime, not yet included
 /// into the relay chain.
-const UNINCLUDED_SEGMENT_CAPACITY: u32 = 1;
+const UNINCLUDED_SEGMENT_CAPACITY: u32 = 3;
 /// How many parachain blocks are processed by the relay chain per parent. Limits the
 /// number of blocks authored per slot.
 const BLOCK_PROCESSING_VELOCITY: u32 = 1;
@@ -334,6 +334,9 @@ impl pallet_timestamp::Config for Runtime {
 	/// A timestamp: milliseconds since the unix epoch.
 	type Moment = u64;
 	type OnTimestampSet = Aura;
+	#[cfg(feature = "experimental")]
+	type MinimumPeriod = ConstU64<0>;
+	#[cfg(not(feature = "experimental"))]
 	type MinimumPeriod = ConstU64<{ SLOT_DURATION / 2 }>;
 	type WeightInfo = ();
 }
@@ -478,7 +481,7 @@ impl pallet_aura::Config for Runtime {
 	type AuthorityId = AuraId;
 	type DisabledValidators = ();
 	type MaxAuthorities = ConstU32<100_000>;
-	type AllowMultipleBlocksPerSlot = ConstBool<false>;
+	type AllowMultipleBlocksPerSlot = ConstBool<true>;
 	#[cfg(feature = "experimental")]
 	type SlotDuration = ConstU64<SLOT_DURATION>;
 }