Solana is scheduled to complete its final upgrade today, halving block production time to 200 milliseconds. The reduction, from 250 milliseconds, is expected around 15:00 UTC at epoch 1053, according to Anza, developer of Solana's Agave validator software. This change, part of the SIMD-0525 technical proposal, will allow the blockchain to target five block-production opportunities per second, improving transaction processing speed. However, validators face higher costs and tighter operating windows, as they must vote twice as frequently and each block will carry a maximum of 30 million compute units, down from 37.5 million.