Fuji

Avalanche

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Avalanche (<a href="https://x.com/avax" rel="noopener noreferrer nofollow">@avax</a>) has rolled out one of the most significant performance upgrades in its history. Since the Helicon upgrade activated on mainnet on September 22, the network's C-Chain now verifies blocks in roughly 2 milliseconds, down from approximately 210 milliseconds before the release. That is a roughly 100-fold improvement in block verification speed.
<h2 id="what-continuous-execution-actually-does">What Continuous Execution Actually Does</h2>
The speed gain comes from a mechanism called Continuous Execution, introduced under community proposal ACP-194. <cite>Before Helicon, consensus had to wait for execution to finish before the next block could be accepted, and that serial dependency was the bottleneck. ACP-194 breaks that dependency: consensus now accepts blocks into a queue continuously, while a separate executor drains the queue in parallel.</cite> The result is that the two processes no longer block each other, freeing up significant throughput headroom.
<cite>Post-launch data shows per-block capacity has roughly doubled, giving the C-Chain 2x more headroom per block.</cite> There is one practical nuance for developers to note: <cite>a transaction's effects finalize a beat after its block is accepted, not at the instant of acceptance, with settlement following roughly five seconds later.</cite>
<h2 id="staking-rules-get-a-significant-overhaul">Staking Rules Get a Significant Overhaul</h2>
Helicon also rewrites validator economics. <cite>The minimum validation period drops from 336 hours (two weeks) to 48 hours, a change aimed at resolving a direct conflict with institutional redemption requirements without weakening network security guarantees.</cite>
<cite>Alongside the shorter minimum, ACP-236 introduces auto-renewed staking, so operators can set custom cycle lengths and automatically compound rewards.</cite><cite>Without auto-renewal, a 48-hour minimum would force continuous node operators to manually submit new staking transactions every two days. Auto-renewal eliminates that friction, giving operators more flexibility over locked capital.</cite>
The looser entry conditions come paired with a tighter performance requirement. <cite>The uptime requirement for validator rewards rises from 80% to 90% for new staking periods.</cite> Helicon also introduces a dynamic minimum gas price, replacing the network's previously fixed fee floor with a stake-weighted median set by validators.
<cite>The upgrade went live on the Avalanche Mainnet on September 22, 2026, at 11 AM ET, delivered through AvalancheGo v1.15.0.</cite><cite>Helicon first hit the Fuji Testnet on July 28, giving developers and validators nearly two months to stress-test the changes before mainnet deployment.</cite>
Sources: <a href="https://build.avax.network/blog/helicon-upgrade" rel="noopener noreferrer nofollow">Avalanche Developer Blog: Helicon Upgrade Overview</a> <a href="https://cryptobriefing.com/avalanche-helicon-upgrade-block-verification/" rel="noopener noreferrer nofollow">Crypto Briefing: Avalanche activates Helicon upgrade, claims up to 100x faster block verification</a> <a href="https://cryptobriefing.com/avalanche-helicon-upgrade-staking-execution/" rel="noopener noreferrer nofollow">Crypto Briefing: Avalanche activates Helicon upgrade, enhancing staking and execution</a>

Avalanche block verification is now 100x faster

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