Useful info about Magento 2.
Awesome coverage of the most popular debugging tools with some systematic approach to debugging.
Great story and tips on how to improve Magento performance by pre-caching the layouts.
Awesome talk with a feature that is ahead of it's time (as something similar is implemented in Magento 2). One of the best talks.
Nice talk with some great ideas that weren't so established in the Magento community. Also some useful Magento 2 information in this talk.
I think some examples could have been better though as they didn't illustrate the points well.
Nice coverage of some Magento 2 stuff.
Some great pointers into the areas where Magento slows down.