mirror of
https://github.com/denoland/deno.git
synced 2024-11-01 09:24:20 -04:00
2164f6b1eb
Welcome to better optimised op calls! Currently opSync is called with parameters of every type and count. This most definitely makes the call megamorphic. Additionally, it seems that spread params leads to V8 not being able to optimise the calls quite as well (apparently Fast Calls cannot be used with spread params).
Monomorphising op calls should lead to some improved performance. Now that unwrapping of sync ops results is done on Rust side, this is pretty simple:
```
opSync("op_foo", param1, param2);
// -> turns to
ops.op_foo(param1, param2);
```
This means sync op calls are now just directly calling the native binding function. When V8 Fast API Calls are enabled, this will enable those to be called on the optimised path.
Monomorphising async ops likely requires using callbacks and is left as an exercise to the reader.
71 lines
1.9 KiB
Rust
71 lines
1.9 KiB
Rust
// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
|
|
|
|
use deno_core::anyhow::Error;
|
|
use deno_core::op;
|
|
use deno_core::Extension;
|
|
use deno_core::JsRuntime;
|
|
use deno_core::OpState;
|
|
use deno_core::RuntimeOptions;
|
|
use futures::channel::mpsc;
|
|
use futures::stream::StreamExt;
|
|
use std::task::Poll;
|
|
|
|
// This is a hack to make the `#[op]` macro work with
|
|
// deno_core examples.
|
|
// You can remove this:
|
|
use deno_core::*;
|
|
|
|
type Task = Box<dyn FnOnce()>;
|
|
|
|
fn main() {
|
|
let my_ext = Extension::builder()
|
|
.ops(vec![op_schedule_task::decl()])
|
|
.event_loop_middleware(|state_rc, cx| {
|
|
let mut state = state_rc.borrow_mut();
|
|
let recv = state.borrow_mut::<mpsc::UnboundedReceiver<Task>>();
|
|
let mut ref_loop = false;
|
|
while let Poll::Ready(Some(call)) = recv.poll_next_unpin(cx) {
|
|
call();
|
|
ref_loop = true; // `call` can callback into runtime and schedule new callbacks :-)
|
|
}
|
|
ref_loop
|
|
})
|
|
.state(move |state| {
|
|
let (tx, rx) = mpsc::unbounded::<Task>();
|
|
state.put(tx);
|
|
state.put(rx);
|
|
|
|
Ok(())
|
|
})
|
|
.build();
|
|
|
|
// Initialize a runtime instance
|
|
let mut js_runtime = JsRuntime::new(RuntimeOptions {
|
|
extensions: vec![my_ext],
|
|
..Default::default()
|
|
});
|
|
let runtime = tokio::runtime::Builder::new_current_thread()
|
|
.enable_all()
|
|
.build()
|
|
.unwrap();
|
|
|
|
let future = async move {
|
|
// Schedule 10 tasks.
|
|
js_runtime
|
|
.execute_script(
|
|
"<usage>",
|
|
r#"for (let i = 1; i <= 10; i++) Deno.core.ops.op_schedule_task(i);"#,
|
|
)
|
|
.unwrap();
|
|
js_runtime.run_event_loop(false).await
|
|
};
|
|
runtime.block_on(future).unwrap();
|
|
}
|
|
|
|
#[op]
|
|
fn op_schedule_task(state: &mut OpState, i: u8) -> Result<(), Error> {
|
|
let tx = state.borrow_mut::<mpsc::UnboundedSender<Task>>();
|
|
tx.unbounded_send(Box::new(move || println!("Hello, world! x{}", i)))
|
|
.expect("unbounded_send failed");
|
|
Ok(())
|
|
}
|