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class method

GC.stress=

(::Integer flag) -> ::Integer

(bool flag) -> bool

GC.stress = value → value

# File tmp/rubies/ruby-4.1.0-preview1/gc.rb, line 133
def self.stress=(flag)
  Primitive.gc_stress_set_m flag
end

Enables or disables stress mode. Stress mode causes GC to be invoked at every GC opportunity (all memory and object allocations); it is intended only for debugging and severely degrades performance.

Sets the current GC stress mode to the given value:

If the value is nil or false, disables stress mode.
If the value is an integer, enables stress mode with certain flags; see below.
Otherwise, enables stress mode without any flags.

The flags are bits in the given integer:

0x01: no major GC.
0x02: no immediate sweep.
0x04: full mark after malloc/calloc/realloc.

See also .stress .total_time .stat_heap .verify_compaction_references also in 4.0 · 3.4 · 3.3 · 3.2 · 3.1 · 3.0

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