Pio: I get that if I’m changing the this context, but I never reference this from those functions
Shahinian: IIRC, bind is so complex that it cannot be entirely polyfilled.
Thomlison: Dolby, I suppose I could refactor to use your pattern without too much work, it just seems like such a to-do
Asencio: Well, the spec for Function#bind is two whole freaking pages.
Creswell: Maybe I’ll just have faith that its optimization will be improved in newer engines
Bowgren: Yeah, it does *a lot*
Empleo: Jkoudys: if the usage isn’t affecting your performance, you don’t really need to care about it. Otherwise, you can use more static things, like the partial2 function above
Shahinian: Scary stuff: https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_objects/Function/bind#Bound_functions_used_as_constructors
Ornelaz: Wow, “don’t use this in production because it’s weird”
Grensky: Dolby, my latest profiles show the overhead is _way_ in canvas rendering, hence why I’m looking at optimizing that now
Kapler: It’s about 99% of the CPU for regular execution
Ornelaz: Wow, thats crazy, it shouldn’t be nearly that bad
Gadbaw: Tcsc, it may not be that it’s bad, just that the rest of the code is really low-impact
Adil: Keep in mind it’s running instructions originally intended for a 4MHz cpu, and one that’s waiting on interrupts for a good chunk of that to save power
Ornelaz: I doubt it, it has to be telling you to update something
Cetta: Yeah, because every cycle is rendering. That’s the first optimization I’m doing right now
Quillian: Just a flag to not re-render unless the VRAM has been updated
Ornelaz: Are you doing putImageData on an onscreen canvas?
Ornelaz: Because you should do 100% of your rendering onto an off screen canvas, and then do drawImage at the end with that
Merling: Tcsc, no, putImageData is for my offscreen canvas. It gets drawImage’d to my visible canvas
Lavigne: Help! https://dpaste.de/LMDW#L line 6 is throwing me an error “unexpected value ’s’ “, which is the first character in pageValue. why is that?
Ornelaz: Do you clearImage befroe doing putImageData
Brodigan: But I am just thinking about webgl right now, and how much more fun it would be to try that out now, so I might just drop all that code by tomorrow
Ornelaz: Because you should use a separate canvas
Ornelaz: Put imagedata on that
Oser: Tcsc, no I don’t clearImage
Ornelaz: Then it has to read pixels first
Ornelaz: Which is a very slow operation
Ornelaz: If you want to do webgl you might see a speed up, but you wouldn’t if you’re going to need to do pixel manipulation a lot
Roers: Tcsc, I’m also applying a pixel shader for my scaling algo, so it’ll hit webgl eventually
Pinkstaff: Writing a scaling algo in pure JS 2d canvas was absolutely painful and absurdly slow
Ornelaz: Oh you’re not doing nearest neighbor?
Ornelaz: Yeah for that probably you will want to make the gpu do it
Mcgarrity: Tcsc, putting in this sweet scaler: https://www.shadertoy.com/view/MslGRS
Ornelaz: I love shadertoy so much
Gipple: Yeah I just discovered it. I’m not really a graphics guy, but I’m really enjoying the chance to declare floats in a webapp. This’ll be my first webgl project ever
Ornelaz: You will want that to be an option though, since thats a nontrivial amount of work for a shader, and on my laptop hovers between 40 and 60fps
Westendorf: Tcsc, absolutely – it’s not even desirable for every game
Ornelaz: The guy that made shader toy’s website has all sorts of great articles about graphics too: http://iquilezles.org/www/index.htm
Hannay: Tcsc, I’ll need to eventually support some of the later-day techniques that really pushed the limits of the GPU, e.g. this guy who rendered a bump-map renderer on a gameboy: http://gameboy.modermodemet.se/en/demo/63