gistfile1

somehow the 3.1 branch is seeing an improvement in decoding (can't explain that), and a slowdown in encoding

python 2.6:
yajl        serialize: 0.359  deserialize: 0.442  total: 0.801
yajl        serialize: 0.359  deserialize: 0.433  total: 0.792
yajl        serialize: 0.366  deserialize: 0.434  total: 0.800
yajl        serialize: 0.363  deserialize: 0.426  total: 0.788
yajl        serialize: 0.357  deserialize: 0.437  total: 0.794
yajl        serialize: 0.364  deserialize: 0.423  total: 0.787
yajl        serialize: 0.356  deserialize: 0.420  total: 0.776
yajl        serialize: 0.362  deserialize: 0.441  total: 0.803
yajl        serialize: 0.366  deserialize: 0.425  total: 0.791
yajl        serialize: 0.362  deserialize: 0.435  total: 0.797

python 3.1:
yajl        serialize: 0.434  deserialize: 0.366  total: 0.800
yajl        serialize: 0.437  deserialize: 0.361  total: 0.799
yajl        serialize: 0.446  deserialize: 0.374  total: 0.821
yajl        serialize: 0.444  deserialize: 0.367  total: 0.811
yajl        serialize: 0.459  deserialize: 0.368  total: 0.828
yajl        serialize: 0.439  deserialize: 0.373  total: 0.812
yajl        serialize: 0.442  deserialize: 0.363  total: 0.805
yajl        serialize: 0.457  deserialize: 0.364  total: 0.821
yajl        serialize: 0.439  deserialize: 0.366  total: 0.805
yajl        serialize: 0.455  deserialize: 0.371  total: 0.827


this result for python 3.1 after changing decoding to output bytes instead of unicode strings:

yajl        serialize: 0.424  deserialize: 0.361  total: 0.785
yajl        serialize: 0.431  deserialize: 0.374  total: 0.805
yajl        serialize: 0.425  deserialize: 0.371  total: 0.796
yajl        serialize: 0.429  deserialize: 0.379  total: 0.808
yajl        serialize: 0.421  deserialize: 0.376  total: 0.797
yajl        serialize: 0.443  deserialize: 0.380  total: 0.823
yajl        serialize: 0.420  deserialize: 0.374  total: 0.794
yajl        serialize: 0.427  deserialize: 0.378  total: 0.805
yajl        serialize: 0.422  deserialize: 0.381  total: 0.804
yajl        serialize: 0.429  deserialize: 0.386  total: 0.815

serialization improved by ~30ms, but still ~60ms slower than python 2.x.