trunk is 3 times slower then 0.9?

[Yang Ling]

I have a Pig job typically finish in 20 minutes. I tried Pig code from trunk, 
it takes more than 1 hours to finish. My input and output are on Amazon s3. One 
interesting thing is it takes about 40 minutes to start the mapreduce job, but 
for 0.9.1 release, it takes only less than 1 minute. Any idea?