01 December 2015 P1.0 (Printing)

First printing.

13 November 2015 B6.0

Production is complete. Now it’s on to layout and the printer.

09 September 2015 B5.0

  • Provided details on how bang functions really work.
  • Added more stories from the field.
  • Incorporated feedback from tech reviewers.
  • Fixed typos reported in the errata.
  • Content complete and headed to production.

02 June 2015 B4.0

  • Added new chapter on garbage collector architecture and performance tuning.
  • Removed unused code examples.
  • Fixed typos reported in the errata.

21 May 2015 B3.0

  • Better examples in Chapter 2 that demonstrate Date#strptime optimization and date parsing without regular expressions.
  • Use Thing objects consistently in all each! examples from Chapter 2.
  • Make sure the signal trap example from Chapter 2 returns predictable results when using Ruby 2.2.
  • Corrected explanation of the optimized memory profile in Chapter 6.
  • Fixed typos reported in the errata.

16 April 2015 B2.0

  • Added new chapter on thinking outside the box.
  • More readable screenshots for chapters on profiling.
  • Fixed typos reported in the errata.

23 March 2015 B1.0

First beta release.