does anyone happen to know the overhead involved in parameter passing via C calling convention?<\/p>
By the disassembly of this test file I can see there are some additional instructions compared to the implicit-use-of-global-data version but I'm not familiar enough with x86 to be able to make a determination on whether these are \"free\" or not and in what cases they might or might not be<\/p>
yes I know this \"probably doesn't matter\" and is \"microoptimizing and rabbitholing\" but I want to know the answer anyway<\/p>","generator":{"id":"tag:gnusocial.jp,2026-08-21:notice-source:ActivityPub","objectType":"application","status_net":{"source_code":"ActivityPub"}},"id":"https:\/\/clubcyberia.co\/objects\/d17a64ff-d9ad-4162-b202-35f91697fa6a","object":{"id":"https:\/\/clubcyberia.co\/objects\/d17a64ff-d9ad-4162-b202-35f91697fa6a","objectType":"note","content":"
does anyone happen to know the overhead involved in parameter passing via C calling convention?<\/p>
By the disassembly of this test file I can see there are some additional instructions compared to the implicit-use-of-global-data version but I'm not familiar enough with x86 to be able to make a determination on whether these are \"free\" or not and in what cases they might or might not be<\/p>
yes I know this \"probably doesn't matter\" and is \"microoptimizing and rabbitholing\" but I want to know the answer anyway<\/p>","url":"https:\/\/clubcyberia.co\/objects\/d17a64ff-d9ad-4162-b202-35f91697fa6a","status_net":{"notice_id":null}},"to":[{"objectType":"http:\/\/activitystrea.ms\/schema\/1.0\/collection","id":"http:\/\/activityschema.org\/collection\/public"}],"status_net":{"conversation":"tag:gnusocial.jp,2026-08-01:objectType=thread:nonce=5c8e70650114d896","notice_info":{"local_id":"12978965","source":"ActivityPub"}},"published":"2026-08-01T19:02:44+00:00","provider":{"objectType":"service","displayName":"GNU social JP","url":"https:\/\/gnusocial.jp\/"},"verb":"post","url":"https:\/\/clubcyberia.co\/objects\/d17a64ff-d9ad-4162-b202-35f91697fa6a"},{"actor":{"id":"https:\/\/nicecrew.digital\/users\/tyler","displayName":"Tyler","status_net":{"avatarLinks":[{"url":"https:\/\/gnusocial.jp\/avatar\/214099-original-tmp20231118074933.webp","rel":"avatar","type":"image\/webp","width":634,"height":542},{"url":"https:\/\/gnusocial.jp\/avatar\/214099-96-20231118074933.webp","rel":"avatar","type":"image\/webp","width":96,"height":96},{"url":"https:\/\/gnusocial.jp\/avatar\/214099-48-20231118074933.webp","rel":"avatar","type":"image\/webp","width":48,"height":48},{"url":"https:\/\/gnusocial.jp\/avatar\/214099-24-20231118074933.webp","rel":"avatar","type":"image\/webp","width":24,"height":24}],"profile_info":{"local_id":"214099"}},"image":{"url":"https:\/\/gnusocial.jp\/avatar\/214099-96-20231118074933.webp","rel":"avatar","type":"image\/webp","width":96,"height":96},"objectType":"person","summary":"It's TylerHow to go to heaven: https:\/\/nicecrew.tv\/w\/fkm9q8QmL2vR28XMqbACie","url":"https:\/\/nicecrew.digital\/users\/tyler","portablecontacts_net":{"preferredUsername":"tyler","displayName":"Tyler","note":"It's TylerHow to go to heaven: https:\/\/nicecrew.tv\/w\/fkm9q8QmL2vR28XMqbACie"}},"content":"Cc @theorytoe<\/a> might know but i don't personally off the top of my head if you're like asking about calling c from whatever lang
Afaik since your parameters are typed if you pass the literal data you might be moving a lot more data in and out of memory instead of just passing a pointer to the memory you intend the function to do something with, like normal convention","generator":{"id":"tag:gnusocial.jp,2026-08-21:notice-source:ActivityPub","objectType":"application","status_net":{"source_code":"ActivityPub"}},"id":"https:\/\/nicecrew.digital\/objects\/7f2959f4-e484-4a5b-9caa-affdcc598cf6","object":{"id":"https:\/\/nicecrew.digital\/objects\/7f2959f4-e484-4a5b-9caa-affdcc598cf6","objectType":"note","content":"Cc @theorytoe<\/a> might know but i don't personally off the top of my head if you're like asking about calling c from whatever lang
Afaik since your parameters are typed if you pass the literal data you might be moving a lot more data in and out of memory instead of just passing a pointer to the memory you intend the function to do something with, like normal convention","url":"https:\/\/nicecrew.digital\/objects\/7f2959f4-e484-4a5b-9caa-affdcc598cf6","status_net":{"notice_id":null},"inReplyTo":{"objectType":"note","id":"https:\/\/clubcyberia.co\/objects\/d17a64ff-d9ad-4162-b202-35f91697fa6a","url":"https:\/\/clubcyberia.co\/objects\/d17a64ff-d9ad-4162-b202-35f91697fa6a"}},"to":[{"objectType":"http:\/\/activitystrea.ms\/schema\/1.0\/person","id":"https:\/\/ak.kyaruc.moe\/users\/theorytoe"},{"objectType":"http:\/\/activitystrea.ms\/schema\/1.0\/person","id":"https:\/\/clubcyberia.co\/users\/binkle"},{"objectType":"http:\/\/activitystrea.ms\/schema\/1.0\/collection","id":"http:\/\/activityschema.org\/collection\/public"}],"status_net":{"conversation":"tag:gnusocial.jp,2026-08-01:objectType=thread:nonce=5c8e70650114d896","notice_info":{"local_id":"12978966","source":"ActivityPub"}},"published":"2026-08-01T19:02:43+00:00","provider":{"objectType":"service","displayName":"GNU social JP","url":"https:\/\/gnusocial.jp\/"},"verb":"post","url":"https:\/\/nicecrew.digital\/objects\/7f2959f4-e484-4a5b-9caa-affdcc598cf6"}],"links":[{"url":"https:\/\/gnusocial.jp\/conversation\/6592824","rel":"alternate","type":"text\/html"}]}