[Solana Mainnet Activates First Slot Time Reduction to 350ms, Effective in Epoch 1020] Solana developer Brennan Watt announced on the X platform that the Solana mainnet has activated the first slot time reduction, targeting a decrease from the current 400 milliseconds to 350 milliseconds, which will officially take effect in Epoch 1020. Watt pointed out that certain SDK constants (such as DEFAULT_MS_PER_SLOT) have not yet been updated to the new value and will be pushed in subsequent versions. The transition period may impact applications that rely on SDK constants to match the mainnet reality, and developers are advised to manually determine whether the functionality is enabled based on Epoch boundaries when it takes effect. Watt explained that the long-term plan is to move these parameters on-chain for client queries, but for now, the transition period is necessary to expedite the rollout of the reduction feature.