denoland-deno/ops/optimizer_tests/op_print.rs at 4eb8e875fd6fc91ff1dbc34b7bc8750fff728a32 - foster/denoland-deno - Foster's Laboratory

foster/denoland-deno

mirror of https://github.com/denoland/deno.git synced 2024-11-30 16:40:57 -05:00

Divy Srivastava 9b2b8df927

feat(ops): Fast zero copy string arguments (#16777 )

Uses SeqOneByteString optimization to do zero-copy `&str` arguments in
fast calls.

- [x] Depends on https://github.com/denoland/rusty_v8/pull/1129
- [x] Depends on
https://chromium-review.googlesource.com/c/v8/v8/+/4036884
- [x] Disable in async ops
- [x] Make it work with owned `String` with an extra alloc in fast path.
- [x] Support `Cow<'_, str>`. Owned for slow case, Borrowed for fast
case

```rust
#[op]
fn op_string_len(s: &str) -> u32 { 
  str.len() as u32 
}
```

2022-12-02 05:29:15 +00:00

6 lines

95 B

Rust

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 fn op_print(
   state: &mut OpState,
   msg: &str,
   is_err: bool,
 ) -> Result<(), AnyError> {
 }