anchor.diff:  xargs.1,pithy,pithy,8,2603,0.000723,0.000918,0.001060,0.001464
   xargs.1,pithy,pithy,9,2563,0.000726,0.000918,0.001059,0.001390
   xargs.1,quicklz,quicklz,,2472,0.000725,0.000919,0.001078,0.001510
  -xargs.1,snappy,snappy,,2509,0.000723,0.000918,0.001061,0.001392
  +xargs.1,snappy,snappy,,2509,0.000018,0.000019,0.000008,0.000008
   xargs.1,snappy,snappy-framed,,2527,0.000024,0.000024,0.000021,0.000021
   xargs.1,zlib,deflate,1,1846,0.000083,0.000083,0.000021,0.000021
   xargs.1,zlib,deflate,2,1820,0.000085,0.000085,0.000021,0.000021
  
positive.code: kennedy.xls,pithy,pithy,8,427736,0.002795,0.003129,0.002613,0.003059
  kennedy.xls,pithy,pithy,9,429489,0.002809,0.003133,0.002508,0.002850
  kennedy.xls,quicklz,quicklz,,310600,0.002349,0.002674,0.003334,0.003665
  kennedy.xls,snappy,snappy,,424519,0.002470,0.002780,0.003023,0.003521
  kennedy.xls,snappy,snappy-framed,,424702,0.004346,0.004344,0.003520,0.003518
  kennedy.xls,zlib,deflate,1,242293,0.007912,0.007907,0.002463,0.002476
  kennedy.xls,zlib,deflate,2,233553,0.008089,0.008084,0.002177,0.002176
  
negative.code: ooffice,pithy,pithy,8,4378913,0.023339,0.023681,0.006993,0.006990
  ooffice,pithy,pithy,9,4360314,0.023735,0.024079,0.007134,0.007131
  ooffice,quicklz,quicklz,,4013859,0.021687,0.022620,0.020873,0.020859
  ooffice,snappy,snappy,,4271150,0.016696,0.016683,0.006656,0.006653
  ooffice,snappy,snappy-framed,,4272190,0.032184,0.032182,0.021078,0.021064
  ooffice,zlib,deflate,1,3290526,0.114277,0.114204,0.031413,0.031393
  ooffice,zlib,deflate,2,3238282,0.125431,0.125353,0.031048,0.031032
  