[ https://issues.jboss.org/browse/ISPN-5542?page=com.atlassian.jira.plugin.... ] Dan Berindei commented on ISPN-5542: ------------------------------------ Ok, so you are only testing read access, and no eviction... the link I posted isn't relevant in this case. The results were a bit lower and more tightly grouped on my machine (i7-4900MQ, OpenJDK 1.8.0_45 with {{-server -XX:+AggressiveOpts -XX:+UseCompressedOops}}): {noformat} Benchmark Mode Cnt Score Error Units MapBenchmark.testCache thrpt 200 11450421.970 ± 64022.513 ops/s MapBenchmark.testChm thrpt 200 121654143.099 ± 349886.912 ops/s MapBenchmark.testDataContainer thrpt 200 96444066.368 ± 1088248.658 ops/s {noformat} Still, it's weird how huge the difference between the CHM and DataContainer results are, considering that all {{DataContainer.get(k)}} does extra is {{if(e != null && e.canExpire())}} and that {{canExpire()}} can be replaced by the JIT with {{false}}. I really expected {{DC.get()}} to be inlined and for DC to perform exactly the same as CHM, but I guess there's still a type guard in there. -- This message was sent by Atlassian JIRA (v6.3.15#6346)