The ASH Browser provides an easy access to the Oracle Active Session History snapshots stored in the Oracle V$ACTIVE_SESSION_HISTORY and DBA_HIST_ACTIVE_SESS_HISTORY views. Toad also captures query information from the V$SQL and V$SQL_PLAN views, giving you all the information you need to diagnose and correct query-related performance bottlenecks.
The CPU wait is telling, that the most of the tasks time is spent on CPU operations (not e.g. DISK or Network).
There are also another tools in Toad for Oracle (e.g. ADDM/AWR reports) for performance analysis. It is possible to use SQL Optimizer for Oracle for tuning of SQL queries and Spotlight on Oracle for monitoring and identifying of possible bottlenecks.
