cpu execution time

基本解释

The task accounts for its time with the CPU by adding its execution time to the virtual runtime and is then inserted back into the tree if runnable.
任務通過將其運行時間添加到虛擬運行時，說明其佔用 CPU 的時間，然後如果可運行，再插廻到樹中。
The cost can be one of the following metrics: execution time per query execution, user CPU time per query execution, and system CPU time per query execution.
這裡所說的成本可能是下麪的度量之一：每次查詢執行的執行時間、每次查詢執行的用戶 CPU 時間、以及每次查詢執行的系統 CPU 時間。
Experimental comparison with the previous work indicates that it accelerates the sampling speed in the large transaction databases which reduces CPU execution time, and possesses a good scalability.
通過實騐分析表明，該算法明顯地加快了大事務數據庫中採樣的速度，從而降低了CPU時間，而且具有很好的可擴展性。