1. if-else 两个调用相同的Function,但是参数不同, 通常情况性能下降一半 2 使用Constants 或者Load/Fetch来替代大量的if-elseif实现查找表 lookup table 3 使用多个if语句替代if-elseif以使用少量的ALU来替代分支语句。 4 switch-case优化 1. if-else 两个调用相同的Function,但是参数不同, 通常情况性能下降一半...
由于switch语句表达的意图与if/else链相同,但以更严格、更正式的方式,您的第一个猜测应该是编译器将能够更好地优化它,因为它可以得出更多关于您的代码条件的结论(即只有一种状态可能是真的,即正在比较的值是一个基元类型等)当您比较两个类似的语言结构以获得运行时性能时,这是一个非常安全的一般事实。关于.NET:...
If vs Switch Caseis one of clarity. It shouldn't make much difference in term of performance.
The result of the switch if switchValue does not match any of the cases. cases Type: array<System.Linq.Expressions.SwitchCase[] The set of cases for this switch expression. Return Value Type: System.Linq.Expressions.SwitchExpression The created SwitchExpression. Remarks All SwitchCase ...
In the case ARP broadcast suppression is enabled and Leaf 1 receives the ARP request, Leaf 1 checks whether it has Host 2's MAC address based on the destination IP address of the ARP request. If Leaf 1 has Host 2's MAC address, it replaces the destination MAC address of the ARP ...
task-name Specifies the name of a performance statistics task. The value is a string of 1 to 31 case-insensitive characters, spaces not supported. The string contains letters, digits, and underscores (_), and must start with letters or digits. Views PM view Default Level 2: Configuration ...
case 2: somethingElse = something; break; // is not flagged and is valid} return somethingElse Anonymous November 15, 2004 The comment has been removed Anonymous November 15, 2004 Ah.. I forgot to mention: IF fallthrough would have been an option for switch then my analogy breaks. Anonymo...
Multiple If statements to set Row Visibilty in a SSRS report. Multiple IIF in an Expression in SSRS Multiple parameters with CASE statement in the WHERE clause - I appreciate any help. multiple result sets from stored procedure bind to tabs in ssrs report Multiple Select Parameter Only Selecting...
After you adjust the perspective, clickSave as Initial Perspectiveto fix the custom perspective asInitial Perspective. In such case, the coordinates of the initial perspective on the right will also change accordingly. During the adjustment, you can clickBack to Initial Perspectiveto restore to the...
Running the statistics-cycle command in the performance statistics task view has the following impacts: Performance statistics of the performance statistics task are deleted. The default interval at which the system generates performance statistics files is used. In the case of a short statistics collec...