[Omake] What comes after cons-hash?

[Jason Hickey]

Thanks for the fix, that's cool what you found!

The case-insensitive issue seems like a good plan.  I think it should  
be reasonably easy to detect.  I guess on Linux, you can test with a  
vfat filesystem.

A pending thought.  We use SymbolTable a lot, so we might benefit  
from hash-consed symbols.  I'd suggest this as the better  
alternative, but in 0.9.9 the dynamic environment becomes a  
VirtualVarTable, and virtual_var are already hash-consed.  The object  
and private environments still use symbols.  Those string comparisons  
hurt performance.

Jason

On Mar 20, 2007, at 5:22 PM, Aleksey Nogin wrote:

> Jason,
>
> I think I am now fairly comfortable with the cons-hash patch and  
> ready to move on. What do you want the next step(s) to be? Trying  
> to figure out case insensitive filesystems?
>
> Aleksey
>
> On 20.03.2007 17:06, Aleksey Nogin wrote:
>
>> Further optimized the path code, finally bringing the performance  
>> close to
>> what it was before the hash-cons patch was applied.
>> The problem was that when appending an extra path (which might  
>> contain ".."
>> somehere inside) to a directory, it would fully reconstruct the  
>> directory and
>> then construct it from scratch again. In presence of cons-hashing  
>> this is
>> really expensive.
>> The obvious solution is not to deconstruct and only pop one level  
>> every time
>> the ".." is encountered.
>> ----
>> Changes:
>>     +29 -38	omake-branches/0.9.8.x/src/ir/omake_node.ml
>>  A hyperlinked version of this commit is available at
>> http://svn.metaprl.org/commitlogs/omake/ 
>> 2007-03.html#07/03/20.17:06:04
>> _______________________________________________
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>
>
> -- 
> Aleksey Nogin, Research Staff Member
> Advanced Technologies Department, Information & System Sciences Lab
> HRL Laboratories, LLC, Malibu, CA
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> OMake-Devel at metaprl.org
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--
Jason Hickey                  http://www.cs.caltech.edu/~jyh
Caltech Computer Science      Tel: 626-395-6568 FAX: 626-792-4257