计算机的运行速度主要取决于什么

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select * from tbl_Articles WHERE ArticleID=2579642 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2579642 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2579642 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1297450,1130732,1111294,1102646,1104863,1106208,1107048,1114852,1070772,1099209,1118280,1110011,1107394,1102696,1108580,1099335,1115735,1103418,1096997,1093204,1108065,1098157,1105219,1093427,1120255,1084503,1100829,1103485,1085754,1097963) ORDER BY field (ArticleID,1297450,1130732,1111294,1102646,1104863,1106208,1107048,1114852,1070772,1099209,1118280,1110011,1107394,1102696,1108580,1099335,1115735,1103418,1096997,1093204,1108065,1098157,1105219,1093427,1120255,1084503,1100829,1103485,1085754,1097963)