Re: Re: why lua table don't use prime number to hash

[Roberto Ierusalimschy <roberto@...>]

> >Is yours a real problem? Do you have a program that does something
> >useful to someone that is having performance problems because of
> >this hashing?
> yes, I am a online game server developer, and we use Lua to write the whole game's logic.
> this is the real problem that happened in our server which stuck the server about 10 seconds.

If you can change the code of your Lua implementation, you can try the
following:

In file 'ltable.c', change the definition of 'hashint':

-#define hashint(t,i)           hashpow2(t, i)
+#define hashint(t,i)           hashmod(t, l_castS2U(i))

See if that helps and report back to us.

-- Roberto