According to Foresight News, Starknet announced that it has completed the Starknet v0.13.2 (Bolt) upgrade on the mainnet, supporting parallel execution and block packing.

Parallel execution enables transactions within the Starknet sequencer to be executed simultaneously.

Block bundling allows batching of L1 fixed costs by batching multiple L2 blocks into a special application recursive proof where each Starknet state update processes multiple Starknet blocks.