JAjacobolus·Oct 16, 2019
In https://github.com/kstenerud/bit-tricks/blob/master/sign.h
Why not use: (x > 0) - (x < 0)
In Mispredicted branches can multiply your running timeskstenerud
bit-tricks
C2019–2019
kstenerud / bit-tricks
bit-tricks
Various tricks for dealing with bits
3Distinct people
4Mentions
0Explicit recommenders
21GitHub stars
What to know before exploring
What it is
Various tricks for dealing with bits
GitHub
Where it is used
No documented product use has been verified yet.
What people are saying
No recommendation phrase was found in the indexed comments.
No classified warning is attached to this page. Read the discussions before treating silence as approval.
Also in these discussions
No other repository is repeatedly linked in the same discussions.
This week on Hacker News
Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 3:56:07 PM UTC.
No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.
Mentions over time
HN mentions by day4 dated mentions
Observed mentions: 2019-09-27 10:10:01 UTC to 2019-10-16 17:29:20 UTC.
Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.
View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| Sep 27 | 2019-09-27 00:00:00 UTC | 2019-09-28 00:00:00 UTC | 1 | 0 | 1 |
| Sep 28 | 2019-09-28 00:00:00 UTC | 2019-09-29 00:00:00 UTC | 0 | 0 | 0 |
| Sep 29 | 2019-09-29 00:00:00 UTC | 2019-09-30 00:00:00 UTC | 0 | 0 | 0 |
| Sep 30 | 2019-09-30 00:00:00 UTC | 2019-10-01 00:00:00 UTC | 0 | 0 | 0 |
| Oct 1 | 2019-10-01 00:00:00 UTC | 2019-10-02 00:00:00 UTC | 0 | 0 | 0 |
| Oct 2 | 2019-10-02 00:00:00 UTC | 2019-10-03 00:00:00 UTC | 0 | 0 | 0 |
| Oct 3 | 2019-10-03 00:00:00 UTC | 2019-10-04 00:00:00 UTC | 0 | 0 | 0 |
| Oct 4 | 2019-10-04 00:00:00 UTC | 2019-10-05 00:00:00 UTC | 0 | 0 | 0 |
| Oct 5 | 2019-10-05 00:00:00 UTC | 2019-10-06 00:00:00 UTC | 0 | 0 | 0 |
| Oct 6 | 2019-10-06 00:00:00 UTC | 2019-10-07 00:00:00 UTC | 0 | 0 | 0 |
| Oct 7 | 2019-10-07 00:00:00 UTC | 2019-10-08 00:00:00 UTC | 0 | 0 | 0 |
| Oct 8 | 2019-10-08 00:00:00 UTC | 2019-10-09 00:00:00 UTC | 0 | 0 | 0 |
| Oct 9 | 2019-10-09 00:00:00 UTC | 2019-10-10 00:00:00 UTC | 0 | 0 | 0 |
| Oct 10 | 2019-10-10 00:00:00 UTC | 2019-10-11 00:00:00 UTC | 0 | 0 | 0 |
| Oct 11 | 2019-10-11 00:00:00 UTC | 2019-10-12 00:00:00 UTC | 0 | 0 | 0 |
| Oct 12 | 2019-10-12 00:00:00 UTC | 2019-10-13 00:00:00 UTC | 0 | 0 | 0 |
| Oct 13 | 2019-10-13 00:00:00 UTC | 2019-10-14 00:00:00 UTC | 0 | 0 | 0 |
| Oct 14 | 2019-10-14 00:00:00 UTC | 2019-10-15 00:00:00 UTC | 0 | 0 | 0 |
| Oct 15 | 2019-10-15 00:00:00 UTC | 2019-10-16 00:00:00 UTC | 0 | 0 | 0 |
| Oct 16 | 2019-10-16 00:00:00 UTC | 2019-10-17 00:00:00 UTC | 3 | 0 | 3 |
What Hacker News says
4 sources> https://github.com/kstenerud/bit-tricks/blob/master/bytes_re...
looks like over-engineering of (bits + 7) >> 3
In Mispredicted branches can multiply your running timesThis is the main reason why I've codified a bunch of bit tricks so I don't forget them [1]. They're often not worth using, but can sometimes work as a last-mile optimization after you've done all your algorithmic changes, cache locality, sizing, alignment, etc.
[1] https://github.com/kstenerud/bit-tricks
In Mispredicted branches can multiply your running timesWhat about some sort of code URI? Maybe something like:
code:github.com/kstenerud/bit-tricks/absolute_value.h/absolute_value
In GitHub releases an ImageNet for code and a CodeSearchNet challenge