{
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  "path": "/t/idea-add-an-option-to-set-the-mode-to-fs-copy/24080#post_7",
  "publishedAt": "2026-03-14T22:11:39.000Z",
  "site": "https://internals.rust-lang.org",
  "textContent": "As mentioned by zackw, `io::copy` definitely can do those. The implementation literally first tries a function called `kernel_copy` and falls back to generic copying if that doesn’t work. Specifically on Linux the docs note that\n\n> On Linux (including Android), this function uses `copy_file_range(2)` , `sendfile(2)` or `splice(2)` syscalls to move data directly between file descriptors if possible.",
  "title": "Idea: Add an option to set the mode to fs::copy"
}