java Programming Glossary: lookupswitch

http://stackoverflow.com/questions/1061101/java-if-vs-switch

In bytecode there are two forms of switch tableswitch and lookupswitch . One assumes a dense set of keys the other sparse. See the..

Why does Java switch on ordinal ints appear to run faster with added cases?

http://stackoverflow.com/questions/15621083/why-does-java-switch-on-ordinal-ints-appear-to-run-faster-with-added-cases

the switch table is transformed into what looks like a lookupswitch similar to if else if structure . Decompiling the assembly generated..

Java enum and additional class files

http://stackoverflow.com/questions/1834632/java-enum-and-additional-class-files

2 This switch map is then used to generate an index for a lookupswitch or tableswitch JVM instruction. It converts each enum value.. 4 invokevirtual #3 Method EnumClass.ordinal I 7 iaload 8 lookupswitch 2 1 36 2 39 default 42 36 ldc #4 String value 1 38 areturn.. as it performs a more efficient constant time lookup vs. lookupswitch 's linear search. Technically speaking javac could omit this..

Switch Statement with Strings in Java

http://stackoverflow.com/questions/338206/switch-statement-with-strings-in-java

binary search for the correct case is performed&mdash the lookupswitch instruction. In de sugaring a switch on String objects both.. objects both instructions are likely to be used. The lookupswitch is suitable for the first switch on hash codes to find the original.. generally appears better than the O log n performance of lookupswitch it requires some analysis to determine whether the table is..