GC performance - was Re: [gclist] GC topics

[Kelvin Nilsen]

>>
>> I think that 20% is an acceptable overhead for GC. I also read
>> somewhere that it is usually less (about 5%?) .
>>
>
>I guess that the difference (between 5% and 20%) might come from the fact
>that we do not generate native code directly from YAFL, but generate
>intermediate C instead.

Are the two of you talking about the same thing?

  In my experience, measurements of 5% or less usually refer to the time spent
  in garbage collection itself.  Measurements of 20% or higher usually refer
  to the maintenance overhead of supporting the garbage collection protocol
  (e.g. setting up run-time type tags, implementing read/write barriers,
   following indirection pointers...)



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