- The Fermi hard fork will reduce block times to 250 ms, enabling faster real-time and DeFi applications.
- It will also introduce extended voting and partial indexing, improving stability and enabling lighter nodes.
- The experimental BAL implementation showed execution improvements of about 18.6% in local tests.
BNB Smart Chain is preparing for a major protocol upgrade scheduled for early next year.
The upcoming Fermi hard fork, planned to activate on mainnet in January 2026, signals a renewed effort to achieve faster block times, higher throughput, and infrastructure tailored for latency-sensitive applications.
The upgrade follows months of testing and reflects broader industry efforts to close the performance gap with traditional financial systems.
BNB Smart Chain set for a significant block-time reduction
According to a release on GitHub, the Fermi hard fork is expected to go live on the BNB Smart Chain mainnet on January 14, after roughly two months of live testing on the Fermi testnet.
At the core of the upgrade is a sharp reduction in block times, dropping to 250 milliseconds from the current 750 milliseconds.
This change firmly places BNB Smart Chain among blockchains with sub-second block times.
It’s designed to support applications that rely on rapid confirmations, including high-frequency trading tools, real-time gaming, and advanced decentralized finance (DeFi) protocols.
Shorter block intervals often introduce trade-offs, especially around network communication and validator coordination.
To address these challenges, the Fermi upgrade introduces extended voting parameters to help compensate for message propagation delays between nodes.
These adjustments aim to preserve consensus stability even as blocks are produced roughly three times faster than before.
The result is a network that can process transactions more quickly without sacrificing correctness or security—a balance that has proven difficult for many layer-1 blockchains.
Currently, BNB Smart Chain is one of the more widely used layer-1 networks, processing about 165 transactions per second, according to Chainspect.
That places it behind L1 networks like Solana, which currently reach up to roughly 799 transactions per second.
With the Fermi hard fork, BNB Smart Chain aims for faster block production and reduced confirmation delays, particularly during peak usage—an important improvement for DeFi applications.
The upgrade also introduces a partial ledger indexing mechanism. Instead of forcing users and node operators to download the entire historical ledger, the new system allows participants to sync only the data they need.
This will significantly reduce storage and compute requirements, making it easier to run nodes and interact with the network.
Experimental progress points to potential gains
Specifically, the Fermi hard fork builds on recent experimental work focused on execution performance, notably the client version v1.6.4-feature-BAL7928 released late last year.
That experimental build implements a non-consensus Block-Access-List (BAL) based on EIP-7928 and similar in design to BEP-592.
Rather than changing consensus rules, BAL data is shared via peer-to-peer block propagation messages, enabling more efficient transaction execution when the data is available.
In local test environments, the BAL implementation produced an average performance improvement of about 18.6% measured in millions of gas per second.
Developers note, however, that real-world benefits depend on broad network adoption, since nodes will see performance gains only when peers also support the feature.
As competition among layer-1 blockchains intensifies, these updates position BNB Smart Chain to better serve high-demand applications and growing user activity.
That could renew interest in Binance Coin (BNB), potentially supporting a price rebound after a three-month decline, during which BNB fell to around $833.48 from an October 2025 peak of $1,369.99.