20MB RandomRead

with JIT:
Wall Clock    User    Kernel
176.008       145.190 30.790
175.728       144.980 30.730
175.796       145.420 30.360

withoutJIT:
Wall Clock    User    Kernel
174.761       143.540 31.220
174.739       143.430 31.300
174.768       143.880 30.880

