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Re: [Public WebGL] For review: ANGLE_timer_query extension
With a high level of confidence I can tell you that it won't be acceptable to use callbacks for some of the scenarios this API is useful for and those are the very same scenarios that make me really wish to see it implemented. I still do not understand the desire to radically alter the way the API is designed (from a way that can be used performantly to a way with (arguably) questionable performance characteristics) when there are solutions to the issues that don't require it.
Instead of changing this API and implementing it (and realistic demos to benchmark) twice I'd rather see work done on making readPixels async. That's a call that's killing us today and would actually have a massive benefit in being switched to a callback.