Polygon Patches Two Bor Bugs That Let Valid Transactions Slow Nodes

• —One bug let speculative execution retain excessive calculated data in a shared cache
• —The other repeatedly recalculated a contract's code hash instead of reusing the result
• —In testing, serial execution finished in tens of milliseconds while parallel work ran about 11 seconds
• —Private builds shipped for Amoy on Oct 5 and mainnet on Oct 8; disclosure came Oct 15