Home » Author Archives: Richard Warburton (page 2)

Author Archives: Richard Warburton

Richard is a Principle Software Engineer at jClarity, interested in deep dive performance issues and compiler verification, Adopt-aJSR, Adopt OpenJDK and the LJC. He holds a PhD from the University of Warwick and lives in London.

Lambdas: coming to a Java 8 near you!

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What are Lambdas? A lambda expression is a type of anonymous function, that can be written inline within a method and used wherever expressions are used. Sometimes you might find them referred to as closures, though there are some caveats to that reference that I explain below. Like a normal Java method it has parameters and a body that can ...

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Garbage Collection in Java (3)

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This follows on from my previous two garbage collection blog posts: Overview of GC in Hotspot. Parallel Garbage Collectors. Concurrent Mark Sweep The parallel garbage collectors in Hotspot are designed to minimise the amount of time that the application spends undertaking garbage collection, which is termed throughput. This isn’t an appropriate tradeoff for all applications – some require individual pauses ...

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Garbage Collection in Java (2)

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Parallel Scavenge Today we cover how Parallel GC works. Specifically this is the combination of running a Parallel Scavenge collector over Eden and the Parallel Mark and Sweep collector over the Tenured generation. You can get this option by passing in -XX:+UseParallelOldGC though its the default on certain machine types. You may want to read my first blog post on ...

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Garbage Collection in Java (1)

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This is the first in a series of posts about Garbage Collection (GC). I hope to be able to cover a bit of theory and all the major collectors in the hotspot virtual machine over the course of the series. This post just explains what garbage collection is and elements common to different collectors. Why should I care? Your Java ...

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