Utilizing the Java microbenchmark harness, this tool tests the performance of casting via Java's Generics interface.
mvn clean install
java -jar target/benchmarks.jar
Benchmark Mode Cnt Score Error Units
BakedGenericAbstractTest.testBaked thrpt 25 266546871.324 ± 1074252.464 ops/s
BakedGenericAbstractTest.testChecked thrpt 25 266401293.377 ± 965579.091 ops/s
BakedGenericAbstractTest.testExplicit thrpt 25 267428631.832 ± 889488.958 ops/s
BakedGenericAbstractTest.testUnchecked thrpt 25 266835768.038 ± 692698.604 ops/s
BakedGenericInterfaceTest.testBaked thrpt 25 436224760.928 ± 1154834.127 ops/s
BakedGenericInterfaceTest.testChecked thrpt 25 437233111.351 ± 950077.861 ops/s
BakedGenericInterfaceTest.testExplicit thrpt 25 3862523572.417 ± 6638293.715 ops/s
BakedGenericInterfaceTest.testUnchecked thrpt 25 436670248.975 ± 1699424.348 ops/s
ExplicitGenericAbstractTest.testChecked thrpt 25 3863604719.400 ± 5981320.891 ops/s
ExplicitGenericAbstractTest.testExplicit thrpt 25 3857546118.700 ± 10817074.013 ops/s
ExplicitGenericAbstractTest.testUnchecked thrpt 25 3863595037.248 ± 6490885.950 ops/s
ExplicitGenericInterfaceTest.testChecked thrpt 25 434639179.158 ± 1463899.929 ops/s
ExplicitGenericInterfaceTest.testExplicit thrpt 25 3859999619.500 ± 7548272.727 ops/s
ExplicitGenericInterfaceTest.testUnchecked thrpt 25 435984877.555 ± 1320205.614 ops/s
ExtendsSubClassGenericInterfaceTest.testChecked thrpt 25 435087843.047 ± 1610483.278 ops/s
ExtendsSubClassGenericInterfaceTest.testExplicit thrpt 25 3862198427.936 ± 6743883.310 ops/s
ExtendsSubClassGenericInterfaceTest.testUnchecked thrpt 25 435555025.013 ± 1608941.950 ops/s
GenericInterfaceTest.testCheckedInterface thrpt 25 436673343.116 ± 1367911.515 ops/s
GenericInterfaceTest.testCheckedType thrpt 25 3867603597.624 ± 4231173.358 ops/s
GenericInterfaceTest.testUncheckedInterface thrpt 25 436865121.204 ± 1152837.774 ops/s
GenericInterfaceTest.testUncheckedType thrpt 25 3865949195.806 ± 5964889.174 ops/s
GenericTypeTest.testChecked thrpt 25 3865273735.318 ± 5202807.171 ops/s
GenericTypeTest.testUnchecked thrpt 25 3863034221.170 ± 5955522.736 ops/s
StrictInterfaceTest.testInterface thrpt 25 436029804.561 ± 1542724.795 ops/s
StrictInterfaceTest.testType thrpt 25 3865070528.725 ± 6400293.825 ops/s
StrictSubClassInterfaceTest.testInterface thrpt 25 435713126.417 ± 1544595.848 ops/s
StrictSubClassInterfaceTest.testType thrpt 25 3864218079.403 ± 6794438.832 ops/s
StrictSubClassTypeTest.testType thrpt 25 3861802527.013 ± 7376087.128 ops/s
StrictTypeTest.testType thrpt 25 3860727825.313 ± 6063470.496 ops/s
Clearly invokeinterface is very expensive.