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The tests apparently were not run with simplejson's c extension speedups compiled in. I did so: http://gist.github.com/72412

Simplejson was slightly faster on two out of three tests. Consistently so, when I re-ran the tests.

Test environment: py2.6 on Mac OS X, with simplejson 2.0.9 and python-cjson 1.0.5

Test script: http://gist.github.com/72413

Also, I changed the test script from using time.time() to time.clock(), which according to the python docs should be used for performance testing on unixes.

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