Re[2]: [clisp-list] CLISP stack & hash tables

[Arseny S. <am...@ic...>]

Hello Sam,

Sunday, March 24, 2002, 3:43:24 AM, you wrote:

>> This memory doesn't being allocated at once but only when it's needed
>> through exception mechanism, so I find it safe to change 3M value to,
>> say, 16M (16777216). Maybe we should ask Sam to change Makefile.in ?

Sam> how will this affect the lesser woe32 platforms, like win95?

I didn't think about it. I'll try to check on win95.

>> Question to honorable Sam: You recently maked weak-hash-tables, may be
>> you know, why hash tables are so program-stack hungry ?  Max. HT size
>> seems roughly proportional to program stack size, i.e. for 1.5M stack
>> max HT is 55000, for 3M stack max HT size is 123000.

Sam> I don't think it is:

[24]>> (make-hash-table :size (ash most-positive-fixnum -1) )
Sam> #S(hash-table eql)
[25]>> (make-hash-table :size (1+ (ash most-positive-fixnum -1) ))
Sam> *** - Hash table size 8388608 too large

On winnt all just the same, but if you'll begin to work with big HTs
(limits I have roughly pointed out), "Program stack overflow. RESET"
arises. It's not necessary to fill all such a big HT, usually 5000
elements are enough.

-- 
Best regards,
 Arseny                            mailto:am...@ic...