overhead regression for the annex app

[msridhar]

I tried measuring the overhead of Jalangi 2 instrumentation on annex and comparing the overhead with analysis2.js from Jalangi 1. Here are the running times for the fourth computer move on Chrome 40, where we are running with no client analysis.

analysis2.js from Jalangi 1: ~1.8s
Jalangi 2: ~2.1s

This is a fairly significant slowdown. If I have time I'll try to dig further as to the root cause.