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Lock Free Queue Evolution: From 10M to 470M ops/sec

*Please note this is an LJC event. Skills Matter are hosting this event and are handling the attendance - it is essential that you confirm your place at this link:

Lock Free Queue Evolution: From 10M to 470M ops/sec
Presented by Nitsan Wakart - Approx 1 hour

An in depth examination of the optimization process focused on the humble Single-Producer-Single-Consumer queue, starting from stock JDK queues and iterating/refining/optimizing to achieve extreme performance. On this journey we will cover:

- Lock Free concurrency

- Java Memory Model and Single Writers

- CPU Cache Coherency

- False Sharing and Object Memory Layout

- Benchmarking pitfalls

- And more... (time allowing)

At the end of the talk a free drink will be offered to any finders of further optimizations ;-)

A ppt presentation, some code will be reviewed.

Who should attend:

Anyone with a passion for concurrency, performance or both.

Bio - Nitsan Wakart:

"I'm a long time Java developer (since 2000), my experience in Betting and Finance industries focused on latency sensitive applications leading my career to Java performance engineering. I have been blogging about Java Performance/Concurrency from an empirical perspective for the last year and a bit ( Currently working as a Performance Engineer/Architect for Azul."  


Doors open at 18:15, followed by lightning talks from members of the LJC, refreshments and the main talk. Networking and informal discussion from 8pm at: The Old Ivy House Pub, 166 Goswell Road EC1V 7DT

Please Note:

Nearest tube: Barbican 
Nearest Coffee Shop: Sun Coffee Shop, 55-63 Goswell Road, London, EC1V 7EN for if you arrive early

Refreshments at Skills Matter are being kindly sponsored by Azul Systems (@AzulSystems)

Event organised by the awesome folk at RecWorks - check out the blog here:

*Please note this is an LJC event. Skills Matter are hosting this event and are handling the attendance - it is essential that you confirm your place at this link:

Join or login to comment.

  • Tom

    Was this talk filmed?

    March 17, 2014

    • Anji C.

      Hiya Tom, Skills Matter usually record for us so I chased them up on this. It seems there has been a problem and they are going to get back to me asap - I'll update you soon,

      March 20, 2014

    • Anji C.

      I have spoken to Skills Matter and they didn't record unfortunately. Sorry about that Tom :(

      March 26, 2014

  • Tariq R.

    What's the blog URL?

    March 7, 2014

    • Onkar J.

      Google : psy lob saw

      March 7, 2014

  • Tariq R.

    Excellent topic. Audio was bad. Not enough food for everyone.

    March 7, 2014

  • A former member
    A former member

    It was a good session.

    March 7, 2014

  • Onkar J.

    Excellent talk! Will look up the blog for more.

    March 6, 2014

  • Tariq R.

    Excellent talk! Insights into measuring eg noise from other threads, and dramatic improvements from understanding what happens under the language abstraction.

    1 · March 6, 2014

  • Edward E.

    Sorry for late notice

    March 6, 2014

  • Anji C.

    Guillermo Lopez Taboada will present the lightning talk: "MPI Java (MPJ) vs Disruptor, the race for baremetal Java performance".

    March 4, 2014

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