Computer, Enhance!

Q&A #80 (2025-10-31)

Answers to questions from the last Q&A thread.

Nov 1

16

7

50:18

October 2025

Better Prevention of Dead Code Elimination - Or Is It?

The most straightforward way of isolating a section of optimized code has a hidden gotcha.

Oct 22

31

1

12:06

September 2025

Q&A #79 (2025-09-28)

Answers to questions from the last Q&A thread.

Sep 29

48

29

1:44:43

August 2025

Reading CPU Diagrams

If you've followed the Performance-Aware Programming course up to this point, you already know everything you need to know to ballpark CPU performance…

Aug 20

62

1

30:40

July 2025

Q&A #78 (2025-07-21)

Answers to questions from the last Q&A thread.

Jul 21

44

28

22:48

June 2025

Selectively Preventing Optimizations

When we want to microbenchmark code in a high-level language, we want almost all optimizations applied - except for the ones that would remove the code…

Jun 29

49

6

32:26

Q&A #77 (2025-06-19)

Answers to questions from the last Q&A thread.

Jun 20

43

30

36:48

Simplified Haversine Candidates

Even for a computation as simple as our haversine loop, removing waste yields a surprisingly large performance improvement for very little effort.

Jun 15

68

4

34:11

May 2025

Q&A #76 (2025-05-23)

Answers to questions from the last Q&A thread.

May 23

41

24

40:48

Removing Waste

As we saw in the very beginning of the Performance Aware Programming series, a CPU can be brought to a crawl by drowning it in unnecessary work. How…

May 15

64

4

27:51

Our Very Own Haversine

We've built all the pieces - now it's time to assemble them into a haversine distance function that uses only math we've hand-coded ourselves so we can…

May 5

39

1

9:02

Q&A #75 (2025-05-02)

Answers to questions from the last Q&A thread.

May 2

39

29

1:00:05