Class: DeferredGarbageCollection

Inherits:
Object
  • Object
show all
Defined in:
lib/generators/voluntary/install/templates/spec/support/deferred_garbage_collector.rb,
lib/generators/voluntary/product_dummy/templates/spec/support/deferred_garbage_collector.rb

Overview

makandracards.com/makandra/950-speed-up-rspec-by-deferring-garbage-collection

Constant Summary collapse

DEFERRED_GC_THRESHOLD =

used to be 10.0

(ENV['DEFER_GC'] || 10.0).to_f
@@last_gc_run = 
Time.now

Class Method Summary collapse

Class Method Details

.memory_threshold ⇒ Object 



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# File 'lib/generators/voluntary/install/templates/spec/support/deferred_garbage_collector.rb', line 13

def self.memory_threshold
  @mem = %x(free 2>/dev/null).to_s.split(" ")
  return nil if @mem.empty?
  @mem[15].to_i / (@mem[7].to_i/100)
end

.reconsider ⇒ Object 



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# File 'lib/generators/voluntary/install/templates/spec/support/deferred_garbage_collector.rb', line 19

def self.reconsider
  return if unsupported_enviroment

  if (percent_used = self.memory_threshold)
    running_out_of_memory = percent_used > 90

    # just for info, as soon as we got some numbers remove it
    swap_percent_used = @mem[19].to_i / (@mem[18].to_i/100) rescue 0
    puts "percent memory used #{percent_used} (#{@mem[8]} of #{@mem[7]})"
    puts "percent swap used   #{swap_percent_used} (#{@mem[19]} of #{@mem[18]})"
  else
    running_out_of_memory = false
  end

  if( (DEFERRED_GC_THRESHOLD > 0 && Time.now - @@last_gc_run >= DEFERRED_GC_THRESHOLD) || running_out_of_memory )
    GC.enable
    GC.start
    GC.disable
    @@last_gc_run = Time.now
  end
end

.start ⇒ Object 



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# File 'lib/generators/voluntary/install/templates/spec/support/deferred_garbage_collector.rb', line 8

def self.start
  return if unsupported_enviroment
  GC.disable if DEFERRED_GC_THRESHOLD > 0
end

.unsupported_enviroment ⇒ Object 



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# File 'lib/generators/voluntary/install/templates/spec/support/deferred_garbage_collector.rb', line 41

def self.unsupported_enviroment
  ENV['TRAVIS'] # TODO: enable for ruby 1.9.3 or more RAM
end