ChainedAnalyses2 adds significant slowdown

[msridhar]

ChainedAnalyses2 adds significant slowdown due to this code:

fun = self[field] = function () {
    try {
        var ret1;
        var thisFun = arguments.callee;
        var len = thisFun.afs.length;
        var args = Array.prototype.slice.call(arguments, 0);
        for (var i = 0; i < len; i++) {
            ret1 = thisFun.afs[i].apply(thisFun.afThis[i], args);
        }
        return ret1;
    } catch (e) {
        clientAnalysisException(e);
    }

};

This needs to be sped up for ChainedAnalyses2 to be used in any performance-critical instrumentation.