Ok, so your hypothesis is that this benchmark is fairly frequently executed, so that it's reasonable to think that a precompiled version is stored somewhere? I

Ok, so your hypothesis is that this benchmark is fairly frequently executed, so that it's reasonable to think that a precompiled version is stored somewhere? In that case, to avoid the accusation of cheating, the choice of precompiled code should have an algorithmic basis : For instance, something akin to Alexa rank of the .js at various CDN. That would make sure that JQuery would be precompiled, which could well be rational. But I seriously doubt that such an objective method would include this benchmark code in the IE precompiled payload...