Fix up the tcp raw benchmarks after an internal API change.
PR-URL: https://github.com/iojs/io.js/pull/495
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Since the SlabAllocator was removed the buffer length/offset is no
longer sent to the onread callback. The benchmarks have been updated to
reflect that.
For throughput benchmarks, run with just 5s durations rather than 1s and 3s.
For startup benchmark, run with just a single 1s duration, since it's very
consistent anyway.