BNB Chain Shatters Speed Records: Maxwell Upgrade Pushes Blockchain Into Sub-Second Territory

BNB Chain crossed into sub-second territory on June 30 2025 with the deployment of its Maxwell upgrade at 2:30 am UTC, reducing block times from 1.5 seconds to 0.75 seconds. The update was the second step in a compression roadmap that began in April 2025, when the Lorentz upgrade first reduced block times from three seconds to 1.5.

How Maxwell Cut BNB Chain’s Block Time in Half

Reducing block time from 1.5 seconds to 0.75 seconds meant validators and nodes had to process and exchange information twice as quickly. Maxwell made three changes to its protocols to enable that faster pace.

The first change targeted validator communication, with BEP-563 replacing broadcast-based communication with direct peer channels, allowing validators to exchange votes with less overhead. This change is described by the team as "key for hitting that 0.75s target."

The second addressed block synchronization. With blocks arriving more frequently, nodes had less time to download and sync each block before the next one arrived. Using BEP-564, nodes are now able to fetch multiple blocks at once, as opposed to requesting them individually, using the new GetBlocksByRangeMsg and RangeBlocksMsg message types. The team said this "significantly improves sync speeds across the network."

Meanwhile, the third focused on block scheduling, with BEP-524 fine-tuning how the network scheduled blocks, helping it maintain the faster production pace.

What Maxwell’s Faster Blocks Meant for the Network

The most visible change was faster transaction confirmation. For DeFi traders and applications that depended on precise timing, shorter block times also reduced the delay between submitting a transaction and having it processed.

That faster pace also affected how dApps handled time. Some applications used block counts as timers or added buffers based on the previous 1.5-second block time. Those assumptions could no longer be taken for granted, so developers had to retest any logic that depended on block timing.

This same change also put more pressure on validators, who had to process messages and blocks at a higher rate. Faster block production also increased hardware requirements for running a node. Although BEP-564's faster block synchronization helped reduce some of this burden, the upgrade raised the infrastructure demands of network participation all the same.

The upgrade was accompanied by a move in BNB's price, with BNB gaining 6.5% in the week preceding deployment, trading between $617 and $655, and rising a further 1.2% after the announcement to reach $655.70. Regardless, BNB remained 17% below its all-time high of $788 set in December 2024.