SebastianVerified account

... I'd say a far scarier thing from this "optimization advice" post is that for (let x ...) seems to be 3x slower than for (var x ...)

@trevnorris yeah, I already looked at it and was like "how strange is let specified that you have to produce all this dead code?"

@mraleph you mean the majority of that generated code isn't executed?

@trevnorris it's more like "not needed", the code looks like it tests things that are statically known.

@mraleph ah, okay. I've attempted to determine why that occurs when a class is defined, b/c doesn't happen w/o it, and got lost real quick.

@trevnorris @mraleph It'd likely be for TDZ (which class bindings fall under).

@sebmck @mraleph TDZ.... Total Danger Zone?