Re: inline newNode()
От | Karel Zak |
---|---|
Тема | Re: inline newNode() |
Дата | |
Msg-id | 20021010092216.B12665@zf.jcu.cz обсуждение исходный текст |
Ответ на | Re: inline newNode() (Tom Lane <tgl@sss.pgh.pa.us>) |
Список | pgsql-patches |
On Wed, Oct 09, 2002 at 12:12:12AM -0400, Tom Lane wrote: > Bruce Momjian <pgman@candle.pha.pa.us> writes: > > OK, here is a version of newNode that is a macro. > > If you use memset() instead of MemSet(), I'm afraid you're going to blow > off most of the performance gain this was supposed to achieve. > > > Does anyone have additional suggestions? The only thing I can suggest > > is to make a clear-memory version of palloc because palloc always calls > > MemoryContextAlloc() so I can put it in there. How does that sound? > > I do not think palloc should auto-zero memory. Hard to explain why, > but it just feels like a bad decision. One point is that the MemSet Agree. The memory-management routine knows nothing about real memory usage - maybe is zeroize memory wanted in palloc caller, but maybe not.. The palloc() caller knows it better than plalloc(). If I good remember same discussion was long time ago in linux-kernel list and result was non-zeroize-memory. Karel -- Karel Zak <zakkr@zf.jcu.cz> http://home.zf.jcu.cz/~zakkr/ C, PostgreSQL, PHP, WWW, http://docs.linux.cz, http://mape.jcu.cz
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