Hyperliquid’s testnet IOC priority fee adjustment this round is quite precise: the 8–100 bps range is perfectly positioned to avoid disrupting mainnet user experience, and the sorting logic is also clearly explained—waiting to see the real friction once mainnet goes live.

Wu Blockchain learned that the Hyperliquid testnet now supports setting priority fees for immediate-or-cancel (IOC) orders at 8–100 bps. Within this range, the mempool-level priority effect is consistent with the mainnet and does not constitute a disruptive change. Within the 8–100 bps range, the priority fee is used only to sort IOC orders received at similar times.