Re: [ANN] Lua 5.2.1 (work1) now available
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- Subject: Re: [ANN] Lua 5.2.1 (work1) now available
- From: Roberto Ierusalimschy <roberto@...>
- Date: 2012年3月28日 12:17:24 -0300
> Can you recommend any parameter changes to make the 5.2 garbage
> collector more "5.1-like"?
To make the collector more agressive you must increase its stepmul. By
how much I do not know (see below).
> As far as I can tell, the parameters described in the documentation --
> "pause" and "stepmul" -- are to be the same in both 5.1 and 5.2
> (200 for both)...
Yes, but the GC has many (actually too many) somewhat-arbitrary
constants and formulas that changed from 5.1 to 5.2. (These constants
and formulas are mainly related to the "costs" of each GC step, such as
traversing a table or sweeping an object.)
> [BTW is there a way to get these parameters without changing them?
Yes. See your own answer ;)
The only way I could see is to call e.g. "collectgarbage ('setpause')"
to get the old value and then call it again to _restore_ the old
value (the above call sets it to zero!)...]
-- Roberto