http://www.infoq.com/presentations/JVM-Performance-Tuning-twitter (video & slides)
http://www.infoq.com/articles/9_Fallacies_Java_Performance (video & slides)
http://www.infoq.com/presentations/Visualizing-Java-GC (video & slides)
http://www.infoq.com/articles/Java_Garbage_Collection_Distilled
www.infoq.com/azul_zing/presentations/
Mythbusting modern hardware to gain "Mechanical Sympathy" - Martin Thompson (video) http://gotocon.com/dl/goto-aar-2012/slides/MartinThompson_MythbustingModernHardwareToGainMechanicalSympathy.pdf (slides)
http://parleys.com/play/518f08ece4b0549489a4a398/chapter0/about (video & slides)
https://confluence.atlassian.com/display/ATLAS/Garbage+Collection+(GC)+Tuning+Guide
http://www.infoq.com/articles/Java-Thread-Pool-Performance-Tuning
http://parleys.com/play/517fb1c9e4b0c2a859eb9ecb/chapter0/about (video & slides)
http://www.parleys.com/play/51965ed4e4b0549489a4a404/chapter0/about (video & slides)
JAX London 2012: Java and the Machine Slides: http://www.parleys.com/play/51656f33e4b09b60aec89d23/chapter0/about
Video: http://skillsmatter.com/podcast/agile-testing/garbage-collection-the-useful-parts (Part 1) Slides: http://www.slideshare.net/jclarity/garbage-collection-the-useful-parts-20398683 (Part 1/2) Slides: http://www.slideshare.net/jclarity/hotspot-garbage-collection-tuning-guide (Part 2/2)
http://www.parleys.com/play/51643b58e4b09b60aec89cf4/chapter0/about (slides & video soon to be released after 03 June)
http://java.dzone.com/articles/principles-java-application
http://skillsmatter.com/podcast/home/performance-special-interest-group (video)
http://lwn.net/Articles/552095/
http://www.infoq.com/presentations/Lock-Free-Algorithms
Performance Java User's Group - "For expert Java developers who want to push their systems to the next level"
https://plus.google.com/communities/107178245817384004088
Optimizing Google’s Warehouse Scale Computers: The NUMA Experience - authors from Univ. of Cal (SD) & Google!
http://www.akkadia.org/drepper/cpumemory.pdf
Memory Barriers: a Hardware View for Software Hackers - Paul E. McKenney (Linux Technology Center - IBM Beaverton)
http://www.rdrop.com/users/paulmck/scalability/paper/whymb.2009.04.05a.pdf
Vanilla #Java Understanding how Core Java really works can help you write simpler, faster applications by Peter Lawrey
http://vanillajava.blogspot.co.uk/search/label/Performance
https://gist.github.com/neomatrix369/1ec4211820aef02da43fc0dc24279d00
Excellent collection