For Critter 0.90 what are recommended GTB Cache Settings

[mhalstern]

The default is 32. My pc has plenty of free ram Should I increase this number for elo gain, or will it not make a difference.

[rvida]

Critter stores every TB probe in its hash table with "infinite" depth (lowest probability of being overwritten). Unless the hash table is full it never probes a position twice - here the TB cache is useless. The story changes with long TC or infinite analysis. TB positions will be sooner or later evicted from hash table and the TB cache starts to be really useful. It is much more space efficient than hash table. (one position in hash table consumes 16 bytes of memory, in Gaviota cache only 2 bits)

If hash table is far from 99% full, 32 MB will be enough. If it is at 99%, larger cache size may improve nps.

Richard

[mcostalba]

Critter stores every TB probe in its hash table with "infinite" depth (lowest probability of being overwritten). Unless the hash table is full it never probes a position twice - here the TB cache is useless. The story changes with long TC or infinite analysis. TB positions will be sooner or later evicted from hash table and the TB cache starts to be really useful. It is much more space efficient than hash table. (one position in hash table consumes 16 bytes of memory, in Gaviota cache only 2 bits)

If hash table is far from 99% full, 32 MB will be enough. If it is at 99%, larger cache size may improve nps.

Richard

I quote this comment to express my admiration for your incredible improvement rate.

You've caught up with SF, next stop is Rybka 4, I'm sure

Congratulations Richard.

[Graham Banks]

You've caught up with SF, next stop is Rybka 4, I'm sure

Congratulations Richard.

It would certainly be nice to see a different engine at the top for a change.