Add the test/perf.js microbenchmark.
Add the test/perf.js microbenchmark.

benjamn/recast,kassens/recast,cpojer/recast,stefanpenner/recast,marcioj/recast,ipeychev/recast,kyldvs/recast,benjamn/recast,ersengultepe/recast,benjamn/recast,rwaldron/recast,shumov/recast,fkling/recast