both are same .. because any good optimizing compiler generate same assembly code of them...
On Mon, Nov 22, 2010 at 9:38 AM, Gene <gene.ress...@gmail.com> wrote: > A good compiler will never generate a switch that is slower than an > if...else chain. They will analyze the switch cases and pick one of > several options for code generation. These may include cascaded > conditional jumps (like if...else code), simple jump tables, segmented > jump tables (cascaded jumps pick one of several jump tables because a > single table would be too big), binary searches in a sorted table of > case values, and perfect hash functions. These are the ones I've > seen. There may be others. > > > On Nov 21, 8:15 am, shiva <shivanand.kadwad...@gmail.com> wrote: > > As per my understanding it is compiler depending thing.. > > > > what i feel is switch need to evaluate the expression only once but if > > else if need to evaluate the expression more than once(what if > > expression stored in variable and then compare...) > > > > Does any one please comment difference in speed of switch and if > > depending on how it is implemented... > > > > I heard switch uses jump table for its operation. > > -- > You received this message because you are subscribed to the Google Groups > "Algorithm Geeks" group. > To post to this group, send email to algoge...@googlegroups.com. > To unsubscribe from this group, send email to > algogeeks+unsubscr...@googlegroups.com<algogeeks%2bunsubscr...@googlegroups.com> > . > For more options, visit this group at > http://groups.google.com/group/algogeeks?hl=en. > > -- DIPANKAR DUTTA M-TECH,Computer Science & Engg. E&C Dept,IIT ROORKEE Uttarakhand , India – 247667 ------------------------------------------- website:http://people.iitr.ernet.in/shp/09535009/Website/index.html ph no-09045809987 email:dipan...@iitr.ernet.in <email%3adipan...@iitr.ernet.in> -- You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. To post to this group, send email to algoge...@googlegroups.com. To unsubscribe from this group, send email to algogeeks+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.
