## Original code:
98.50user 0.18system 1:38.68elapsed 100%CPU 

## With ikegami's change:
85.84user 0.24system 1:26.15elapsed 99%CPU 

## Using 8k blocksize for reading
24.62user 0.25system 0:24.87elapsed 100%CPU 

## using 32k blocksize
26.74user 0.37system 0:27.16elapsed 99%CPU 


##</code><code>##

0.38user 0.40system 0:00.95elapsed 82%CPU