Comment by networked

Please run nbench [1]. I ran it on the C1 in April 2015 and got the following results:

  CPU                 : 4 CPU
  L2 Cache            :
  OS                  : Linux 3.2.34-29
  C compiler          : gcc version 4.8.2 (Ubuntu/Linaro 4.8.2-19ubuntu1)
  libc                : libc-2.19.so
  MEMORY INDEX        : 5.859
  INTEGER INDEX       : 8.164
  FLOATING-POINT INDEX: 5.770

For comparison, here are an Intel Atom N450, a Core 2 Duo L7500 and a Raspberry Pi 1 Model B:

  CPU                 : Dual GenuineIntel Intel(R) Atom(TM) CPU N450   @ 1.66GHz 1667MHz
  L2 Cache            : 512 KB
  OS                  : Linux 3.2.0-23-generic
  C compiler          : gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) 
  libc                : libc-2.15.so
  MEMORY INDEX        : 10.845
  INTEGER INDEX       : 9.315
  FLOATING-POINT INDEX: 8.748

  CPU                 : Dual GenuineIntel Intel(R) Core(TM)2 Duo CPU     L7500  @ 1.60GHz 1601MHz
  L2 Cache            : 4096 KB
  OS                  : Linux 3.5.0-26-generic
  C compiler          : gcc version 4.6.1 (Ubuntu/Linaro 4.6.1-9ubuntu3) 
  libc                : libc-2.13.so
  MEMORY INDEX        : 18.734
  INTEGER INDEX       : 14.318
  FLOATING-POINT INDEX: 23.178

  CPU                 :
  L2 Cache            :
  OS                  : Linux 3.6.11+
  C compiler          : gcc version 4.6.3 (Debian 4.6.3-14+rpi1)
  libc                : libc-2.13.so
  MEMORY INDEX        : 2.536
  INTEGER INDEX       : 3.159
  FLOATING-POINT INDEX: 2.157

[1] http://www.tux.org/~mayer/linux/bmark.html