Skip to main content
Peter Cordes's user avatar
Peter Cordes's user avatar
Peter Cordes's user avatar
Peter Cordes
  • Member for 15 years, 9 months
  • Last seen this week
Profile Activity
Stats
373,517
reputation
19.2m
reached
6,717
answers
28
questions
Communities
View all
About

GNU/Linux programmer/performance engineer and command line junkie. He/him.

Primary maintainer of the Stack Overflow tag wiki.

I like efficient code, and knowing how things really work.

I mostly use C/C++ (and perl/bash) on Linux, but I mostly look at assembly-language stuff on SO because it's more interesting to me, and there are fewer people posting good asm answers.

(profile pic is from https://xkcd.com/386/, and describes me perfectly. Incomplete answers/explanations make me crazy.)

Badges
View all badges
50
gold badges
736
silver badges
1,005
bronze badges
Top tags
View all tags
17,664
Score
3,438
Posts
51
Posts %
14,311
Score
2,133
Posts
32
Posts %
9,976
Score
1,163
Posts
17
Posts %
6,372
Score
1,209
Posts
18
Posts %
5,945
Score
1,124
Posts
17
Posts %
5,201
Score
883
Posts
13
Posts %
Top posts
View all questions, answers, and articles
🌐 User Peter Cordes - Stack Overflowansweransweransweransweransweransweransweransweransweranswer - stackoverflow.com
2150
Why does C++ code for testing the Collatz conjecture run faster than hand-written assembly?
Nov 1, 2016
🌐 User Peter Cordes - Stack Overflowansweransweransweransweransweransweransweransweransweranswer - stackoverflow.com
433
Deoptimizing a program for the pipeline in Intel Sandybridge-family CPUs
May 21, 2016
🌐 User Peter Cordes - Stack Overflowansweransweransweransweransweransweransweransweransweranswer - stackoverflow.com
388
How much of β€˜What Every Programmer Should Know About Memory’ is still valid?
Dec 8, 2017
🌐 User Peter Cordes - Stack Overflowansweransweransweransweransweransweransweransweransweranswer - stackoverflow.com
336
What is the best way to set a register to zero in x86 assembly: xor, mov or and?
Nov 12, 2015
🌐 User Peter Cordes - Stack Overflowansweransweransweransweransweransweransweransweransweranswer - stackoverflow.com
326
Does the C++ standard allow for an uninitialized bool to crash a program?
Jan 10, 2019
🌐 User Peter Cordes - Stack Overflowansweransweransweransweransweransweransweransweransweranswer - stackoverflow.com
273
Is incrementing an int effectively atomic in specific cases?
Sep 8, 2016
🌐 User Peter Cordes - Stack Overflowansweransweransweransweransweransweransweransweransweranswer - stackoverflow.com
185
Why does glibc's strlen need to be so complicated to run quickly?
Aug 27, 2019
🌐 User Peter Cordes - Stack Overflowansweransweransweransweransweransweransweransweransweranswer - stackoverflow.com
176
Bubble sort slower with -O3 than -O2 with GCC
Oct 9, 2021
🌐 User Peter Cordes - Stack Overflowansweransweransweransweransweransweransweransweransweranswer - stackoverflow.com
163
Fastest way to do horizontal SSE vector sum (or other reduction)
Feb 8, 2016
🌐 User Peter Cordes - Stack Overflowansweransweransweransweransweransweransweransweransweranswer - stackoverflow.com
157
How to remove "noise" from GCC/clang assembly output?
Jul 24, 2016
Top Meta posts
14
106
77
How are we supposed to post godbolt links now that URL shortening is blocked?
65
The dawn of Documentation: a solstice update
63
Discussion: New AI-generated content policy
62
Are questions that boil down to errors in off-site resources on-topic?
59
Git question with very nonlinear history: Answers cannibalizing each other into redundancy
Top network posts
View all network posts
131
Why does preset "veryfast" in FFmpeg generate the most compressed file compared to all other presets?
100
Why does my browser think that https://1.1.1.1 is secure?
67
Did any compiler fully use Intel x87 80-bit floating point?
64
Why are leap seconds needed so often?
58
The start of x86: Intel 8080 vs Intel 8086?