@saagar how many hours did you spend making this. This is amazing.

@saagar Also, even if it worked well every time (which it doesn't) garbage collection is a crutch for lazy coding. Just delete stuff when you're done with them.

@saagar I don't understand much of the terminology but this is pure genius! 😂

@saagar LLVM dev enters his apartment after a long day at work and is surprised to find the entrance to his kitchen replaced with a brick wall. He calls his landlord, asking what happened. Landlord says the lease specified a 2 bedroom apartment, no mention of a kitchen, so she optimized it out. But don’t worry, she’ll be back tomorrow for the living room.

@shac @saagar the brick wall is merely a curtesy, he's lucky she didn't just delete it and let him fallthrough to whatever was below!

@saagar we watched the original last night so I can hear Nicholson as the voice of LLVM in my head perfectly…which means Kiefer Sutherland is Clang?

@saagar I didn't actually watch this movie so I thought the captions were verbatim xD

@saagar @shac "Well can I have a compiler flag that just turns off that optimization?"

"NO THEN EVERYONE WOULD USE IT."

@saagar bounds checks have a negligible performance impact in many use cases and even when they don't, they're still extremely worth it https://news.ycombinator.com/item?id=33805419

@saagar This got linked in our faculty slack, and if that isn't the definition of viral I don't know what is

@saagar Like, all I saw in the slack notification was your name, and I immediately knew what it was

@saagar
I worked on an early digital telephone switch (at a competitor to Bell Labs), using a safe language with bounds checking. We estimated that the bounds checking cost us ~5-10% performance, and that it was a worthwhile price to pay for reliability -- what good is your performance boost if it's causing system crashes?

A few decades later, I see that Go (by someone from Bell Labs) has "invented" similar slices (I wonder if its compiler is as good as ours was at safely removing unneeded bounds checks).

@saagar You forgot to include integer overflow, for also getting wrong results; and as a bonus, hinders optimisations.
https://mastodon.social/@regehr/111308726824668478