Conventions used

There are a number of text conventions used throughout this book.

Code in text: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "As an example of this, consider a SQL database library that needs to execute INSERT, UPDATE, and DELETE SQL queries to modify data."

A block of code is set as follows:

class Foo
  def self.bar
    :baz
  end
end

Any command-line input or output is written as follows:

# Warming up --------------------------------------
#   MultiplyProf    28.531k i/100ms
# Calculating -------------------------------------
#   MultiplyProf    284.095k (± 0.3%) i/s