this post was submitted on 01 Dec 2025
3 points (100.0% liked)

Hacker News

3082 readers
621 users here now

Posts from the RSS Feed of HackerNews.

The feed sometimes contains ads and posts that have been removed by the mod team at HN.

founded 1 year ago
MODERATORS
patrick@lemmy.bestiver.se
rssbot@lemmy.bestiver.se
3
Why xor eax, eax? (xania.org)
submitted 17 hours ago by rssbot@lemmy.bestiver.se to c/hackernews@lemmy.bestiver.se
2 comments fedilink hide all child comments
 

Comments

you are viewing a single comment's thread
view the rest of the comments
[–] gheesh@lemmy.world 1 points 12 hours ago

The instruction is smaller than "mov eax, 0" (because it includes the 32-bit zero) and the result is the same. Notice that smaller may mean more instructions in cache for a tight loop, so it may also result in better performace, too.