Solana Block Capacity Soars 66% with SIMD-0286 Activation

Solana's block capacity has seen a significant boost after the activation of SIMD-0286 on July 29, 2026. The network upgrade increased the maximum block compute units from 60 million to 100 million, marking a 66% jump in per-block capacity - the largest throughput expansion for Solana in recent memory.

The upgrade was authored by Lucas Bruder of Jito Labs and first proposed publicly on GitHub in May 2025. It underwent testnet and devnet trials before landing on mainnet, following the standard cautious path for changes this significant.

Notably, not everything changed with SIMD-0286. The writable account compute unit cap remains at 12 million CUs, and the maximum block data size delta stays at 100 MB. The upgrade is surgical: more room per block, same slot timing, zero required changes to existing applications.

Early network observations following activation reported improved throughput for high-volume use cases, specifically DeFi and payments. No immediate technical issues were registered, which is about the best outcome a blockchain upgrade can realistically achieve on day one.