This week’s digest is about optimization – how to get more out of mobile performance, Responsive Web Design, your tools, your daily working hours and JS in general. Happy reading.

• Responsive Web Design Performance
  Etsy’s Lara Swanson talks “mobile first” (Design + Performance)
• Performance for Responsive Web Design
  Free webcast presented by Maximiliano Firtman
• JavaScript Array: slice vs splice
  Convention of how to distinguish between modifying and non-modifying object method calls.
• Maker’s Schedule, Manager’s Schedule
  Paul Graham’s piece about “flow” is already 5 years old but still true today.
• Inventing on Principle
  Great talk by Bret Victor about how our tools (or programming in general) should work nowadays.