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Casey Destroys Optimization Myths | Standup #60

TheStandupPod

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Don’t let bad code get merged without reviewing (hopefully not by merge cop!). Checkout out Code Rabbit at https://trm.sh/coderabbit

[Description]
We dive deep into technical performance debates, specifically the nuances of floating-point math—is multiplying by a reciprocal actually faster than division on modern CPUs?

We also break down the latest from Microsoft and NVIDIA, including the "RTX Spark" and the vision of "unmetered intelligence." Plus, don't miss "Trash Facts" about professional bowling and the latest "Snack Picks."

[Chapters]
00:00:00 - Series A
00:03:32 - CodeRabbit
00:005:28 - Pitch Decks
00:07:00 - Trash Facts and small towns
00:11:45 - Trashs Snack picks
00:15:14 - Prime Blocker
00:37:44 - Trash Blocker
00:39:47 - Intro
00:40:52 - Microsoft Surface
00:54:47 - Microsoft’s Pitch
00:58:53 - Local AI
01:07:47 - the keynote
01:16:17 - Local is good
01:19:48 - RTX Spark
01:24:10 - 1000 Games
01:26:02 - Outro

[hosts/guests]
Prime: https://thestanduppod.com/contributor...
Teej: https://thestanduppod.com/contributor...
Trash: https://thestanduppod.com/contributor...
Casey: https://thestanduppod.com/contributor...

[Tags]
TheStandupPod, Software Engineering, Series A Startup, Performance Optimization, Floating Point Math, CPU Cycles, NVIDIA RTX Spark, Microsoft Surface AI, Local AI Agents, Software Development Podcast, Agile Standup, Coding Tips, Tech News 2026, Computer Science, Tech Humor, Programming Performance, Linear App, Decacorn.

Spotify: https://open.spotify.com/show/01A062k...
Clips: @TheStandupPodClips

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20 Comments

@TheStandupPod Creator 4 months ago Pinned

Thanks to Code Rabbit for sponsoring this video. Hope you enjoyed watching Prime beat up Trash.
Check out code rabbit here: https://trm.sh/coderabbit

@Squiggy545 3 months ago

I think the most impressive part of Casey's analysis is his ability to ignore Prime's valiant efforts to derail the conversation.

@doubleHLabs 4 months ago

This podcast keeps interrupting my Merge Cop story

@thaddaeusmarkle1665 4 months ago

Just want to say, this has grown to be one of my favorite podcasts to listen to. Gives the vibe of just four guys hanging out and having a good time, but thanks to Casey or whatever guest you have on it’s actually high in educational value as well. Please never stop!! Y’all awesome.

@mobjThinker 4 months ago

16:02 the sound of Trash crunching snacks in the background while Casey tries to figure out how to dumb the explanation down to our level is peak cinema

@MatthewSparks 4 months ago (edited)

Can we get an episode where we just go over all the shit Trash has done in his past? So far we've gotten Counter Strike, metalcore/emo-band that was on Warped Tour, and tried to be a pro-bowler. And this is all juxtaposed on top of the fact that he STILL ended up becoming a senior engineer at Netflix (btw).

Dude is like an undercover Temu version of the world's most interesting man

@Celastrous 3 months ago

This type of optimization is called a Strength Reduction, and a good compiler can already do this by default

@wholesomecoder 4 months ago

90% of the other devs cannot skip Jira, unfortunately

@ArcticFoxCodes 4 months ago

Here's our TAM, which is every person on Earth - almost every pitch deck I see....

@felipesemnick 4 months ago

The thing that Casey is explaining, I learned it in a numerical calculus assignment, which I've always been terrible at. It was the first time I passed a calculus course without needing to retake it. The professor assigned a project to help with the exam grade, which involved implementing methods for finding non-exact zeros, and he asked for a report on it. I went through all those problems that guy mentioned and managed to learn and understand everything on my own. It was the first time I actually researched and learned things independently. I wrote down everything I learned, terrified of saying the dumbest thing in the world, and in the end, I was the only one who understood the assignment and managed to do what the professor wanted. That's when I decided to follow the path that led me to where I am now. I've rarely been so happy to have understood something like that.

@ZT1ST 3 months ago

The idea that Trash and Casey now have to avoid the Minifig story like the plague to get a full first experience on the next Standup is now my entire week's blocker; I need to get so much popcorn prepared for next week.

@RoughlyUnderstood 4 months ago

I’m glad riverside is too blurry for yall to read. Forces you to describe things really well for audio listeners lol

@itumiwa 4 months ago

40 minutes to get to the heart of the issue in a standup checks out.

@AndreKK- 4 months ago

This is the perfect example of why the Quake software renderer performed a perspective divide only every 8th or 16th pixel.
28:30 that figure probably comes from Agner Fog's instruction tables.
A lot of libraries use this trick, including numerical libraries such as Eigen.
Furthermore, in a loop where elements are processed sequentially, cache misses are generally less likely to become a bottleneck that would significantly reduce throughput.