4.0.0 JNI/reflection invocation 2/4/8 times as slow as in 3.3.3

Sun Jan 23 01:08:00 GMT 2005

On Sat, 2005年01月22日 at 23:06, Tom Tromey wrote:
> >>>>> "Jost" == Jost Boekemeier <jost2345@yahoo.de> writes:
>> Jost> - table = new Object[old.length << 1 + 2];
> Jost> + table = new Object[(old.length * 2) + 2];
> Jost> Imho the new implementation is nonsense.
>> The new implementation is really just the original reimplementation
> resurrected.
>> Jost> This hash is not a "normal" hash table with a list but it is an array
> Jost> where additional entries are stored above the current entry. The
> Jost> implementation requires that empty slots appear between the
> Jost> keys/tombstones, otherwise the hash degenerates to a linear search.
>> Jost> So old.length << 2 could be a good value, or, as the original author
> Jost> decided old.length << 3.
>> I don't follow why that would be better. Could you elaborate on this?
>> Tom

Either I'm missing something or the two at the top are identical, if <<
has higher precedence than +. << 1 is equivalent to multiplication by
2.
-- 
Andrew :-)
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