[B2-devel] Improved SheepShaver/JIT

[Gwenole B. <gb...@di...>]

Hi,

I have just committed a few changes to the SheepShaver JIT. Basically,
gprof told me that 64% of the time was spent in block_cache::find().  
Besides, some extra counters revealed that more than 95% of the blocks are
available at the head of the blocks list for a hash table entry.

i.e. I inlined that fast block lookup case in generated code. On a
Pentium4, Speedometer 4 pure "CPU" benchtest improved by a factor of 3.  
More testing/tuning has yet to be done but overall the speed increase is
interesting. ;-)

Please give it a try.

BTW, there are also fixes to enable MacBench 5.0 to work.

Bye,
Gwenole.