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class method · added in Ruby 3.1

GC.measure_total_time

() -> bool

GC.measure_total_time → true or false

# File tmp/rubies/ruby-4.1.0-preview1/gc.rb, line 645
def self.measure_total_time
  Primitive.cexpr! %{
    RBOOL(rb_gc_impl_get_measure_total_time(rb_gc_get_objspace()))
  }
end

Returns the setting for GC total time measurement in the current Ractor; the main Ractor’s initial setting is true and, with the default GC, other Ractors inherit their creator’s setting. See GC.total_time.

Ruby version changes

3.1
- “GC.measure_total_time = true” enables the measurement of GC. Measurement can introduce overhead. It is enabled by default. GC.measure_total_time returns the current setting. GC.stat[:time] or GC.stat(:time) returns measured time in milli-seconds. [[Feature #10917]]

See also .measure_total_time= .malloc_allocations .malloc_allocated_size .remove_stress_to_class also in 4.0 · 3.4 · 3.3 · 3.2 · 3.1

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