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Presentations
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The Engineer's Guide to HotSpot JIT Compilation
Monica Beckwith discusses the performance introduced by adaptive compilation in the OpenJDK Hotspot VM, focusing on the internals of OpenJDK 8, the reference implementation for Java SE8.
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HotSpot under the Hood
Alex Blewitt presents how HotSpot represents Java objects in memory, how bytecode is compiled into native code to gain the fastest execution time, and how data structures have changed over time.
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JRuby: The Pain of Bringing an Off-Platform Dynamic Language to the JVM
Charles Nutter discusses bringing JRuby to the JVM, why Ruby is hard to implement, JIT compilation, precompilation, core Ruby implementation, Java library access, library challenges and future plans.
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VM Optimizations for Language Designers
John Pampuch discusses the HotSpot compiler, the history of Java performance, HotSpot development philosophies and challenges, optimization, JVM library improvements, and tips for better performance.