Great work, I have experienced the performance that you describe, but never quantified it. Thanks for the effort.

1.) we have a decent qa on staff (finally!)
2.) most errors will be caught by IE/FF
3.) it felt too so darn dirty
4.) performance

…in that order.

1) put the object first, and method name second in call_user_method_array(). That way they are in the same order as a function call.

2) if not, you could make the 2nd argument default to window if it is not supplied, to keep the calling code simpler.

3) rather than pass an array as the third param, you could get the values from the arguments array. It would look something like this:

var call_user_method_array = function(method_name, obj /*, paramarr*/) {
var args = Array.prototype.slice.call(arguments, 2);
try {
return (obj||window)[method_name].apply((obj||window), args);
}
catch (e) {
window.onerror(e.message, window.location, ‘-1′); // use -1 for exceptions
return null;
}
}