kafka multi threaded consumer with very low throughput

[Anurup Raveendran]

I have 2 kafka brokers running on two systems with the same configuration

CPU - Dual Core
RAM - 4 GB

I'm trying to benchmark my kafka setup
Number of messages - 10000

for 2 partitions & 2 threads configuration - consumer consumes in 1.175
seconds

for 1 partition & 1 thread configuration - consumer consumes in 1.253
seconds

Is there some specific configuration which would enable better throughput?