Ivan Mamontov questions

Ivan Mamontov answers

• Java: Why is the default for XX:SurvivorRatio not used?
• Maximum sampling frequency supported by perf
• Does Java ever rebias an individual lock
• how to determine if Java heap is using compressed pointers and whether or not resides at address 0 in memory?
• How to define a primary key field in a Lucene document to get the best lookup performance?
• Performance of Collections.emptyList and empty ArrayList with JIT compiler
• What is size of my Bitset?
• Default -Xss value on Windows for JDK 8
• Loop optimizations Oracle Java 7-8 Hotspot VM
• Why does the JVM show more latency for the same block of code after a busy spin pause?