Menu
Ruby 2.7 improves garbage collection, pattern matching

Ruby 2.7 improves garbage collection, pattern matching

Ruby upgrade also includes enhancements to the REPL and an experimental just-in-time compiler

Credit: Aleksey Nemiro

Ruby 2.7, the latest upgrade of the Ruby programming language, is now generally available as a production release. The new release brings improvements in garbage collection, pattern matching, and REPL (read-eval-print-loop).

New in the Ruby 2.7 is compaction garbage collection, which is used to defragment a fragmented memory space. The GC.compact method compacts the objects in the heap so that fewer pages are used. Members of the Ruby development team explained that some multi-threaded Ruby programs may cause memory fragmentation, which leads to high memory utilization and speed degradation.

Other improvements in Ruby 2.7.0 include:

  • An experimental pattern matching capability, which can traverse a given object and assign a value if it matches a pattern. Pattern matching is widely used in functional programming languages.
  • Multi-line editing is now supported in irb, the interactive Ruby shell. Integration with rdoc, the Ruby documentation system, also is provided. With irb, developers can display the reference for a class, method, or module. Also, source lines shown at binding.irb and inspect results for core-class objects now are colorized.
  • Automatic conversion of keyword and positional arguments has been deprecated. This feature will be removed in Ruby 3.
  • For the still-experimental just-in-time (JIT) compiler, first introduced in Ruby 2.6, JIT-ed code is recompiled to less-optimized code when an optimization has been invalidated. Further, method inlining is performed when a method is considered pure. However, many methods are not yet considered pure.
  • An Enumerable#tally counts the occurrence of each element.
  • Also introduced is a numbered parameter as the default block parameter.

You can download Ruby 2.7 from ruby-lang.org.


Follow Us

Join the newsletter!

Or

Sign up to gain exclusive access to email subscriptions, event invitations, competitions, giveaways, and much more.

Membership is free, and your security and privacy remain protected. View our privacy policy before signing up.

Error: Please check your email address.

Brand Post

Show Comments