mirror of
https://github.com/denoland/deno.git
synced 2024-11-29 16:30:56 -05:00
161cf7cdfd
This change simplifies how we execute V8. Previously V8 Isolates jumped around threads every time they were woken up. This was overly complex and potentially hurting performance in a myriad ways. Now isolates run on their own dedicated thread and never move. - blocking_json spawns a thread and does not use a thread pool - op_host_poll_worker and op_host_resume_worker are non-operational - removes Worker::get_message and Worker::post_message - ThreadSafeState::workers table contains WorkerChannel entries instead of actual Worker instances. - MainWorker and CompilerWorker are no longer Futures. - The multi-threaded version of deno_core_http_bench was removed. - AyncOps no longer need to be Send + Sync This PR is very large and several tests were disabled to speed integration: - installer_test_local_module_run - installer_test_remote_module_run - _015_duplicate_parallel_import - _026_workers
82 lines
2.3 KiB
Rust
82 lines
2.3 KiB
Rust
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
|
|
use super::dispatch_json::{Deserialize, JsonOp, Value};
|
|
use crate::ops::json_op;
|
|
use crate::state::ThreadSafeState;
|
|
use deno_core::*;
|
|
use futures::future::FutureExt;
|
|
use std;
|
|
use std::time::Duration;
|
|
use std::time::Instant;
|
|
|
|
pub fn init(i: &mut Isolate, s: &ThreadSafeState) {
|
|
i.register_op(
|
|
"global_timer_stop",
|
|
s.core_op(json_op(s.stateful_op(op_global_timer_stop))),
|
|
);
|
|
i.register_op(
|
|
"global_timer",
|
|
s.core_op(json_op(s.stateful_op(op_global_timer))),
|
|
);
|
|
i.register_op("now", s.core_op(json_op(s.stateful_op(op_now))));
|
|
}
|
|
|
|
fn op_global_timer_stop(
|
|
state: &ThreadSafeState,
|
|
_args: Value,
|
|
_zero_copy: Option<ZeroCopyBuf>,
|
|
) -> Result<JsonOp, ErrBox> {
|
|
let state = state;
|
|
let mut t = state.global_timer.lock().unwrap();
|
|
t.cancel();
|
|
Ok(JsonOp::Sync(json!({})))
|
|
}
|
|
|
|
#[derive(Deserialize)]
|
|
struct GlobalTimerArgs {
|
|
timeout: u64,
|
|
}
|
|
|
|
fn op_global_timer(
|
|
state: &ThreadSafeState,
|
|
args: Value,
|
|
_zero_copy: Option<ZeroCopyBuf>,
|
|
) -> Result<JsonOp, ErrBox> {
|
|
let args: GlobalTimerArgs = serde_json::from_value(args)?;
|
|
let val = args.timeout;
|
|
|
|
let state = state;
|
|
let mut t = state.global_timer.lock().unwrap();
|
|
let deadline = Instant::now() + Duration::from_millis(val);
|
|
let f = t
|
|
.new_timeout(deadline)
|
|
.then(move |_| futures::future::ok(json!({})));
|
|
|
|
Ok(JsonOp::Async(f.boxed_local()))
|
|
}
|
|
|
|
// Returns a milliseconds and nanoseconds subsec
|
|
// since the start time of the deno runtime.
|
|
// If the High precision flag is not set, the
|
|
// nanoseconds are rounded on 2ms.
|
|
fn op_now(
|
|
state: &ThreadSafeState,
|
|
_args: Value,
|
|
_zero_copy: Option<ZeroCopyBuf>,
|
|
) -> Result<JsonOp, ErrBox> {
|
|
let seconds = state.start_time.elapsed().as_secs();
|
|
let mut subsec_nanos = state.start_time.elapsed().subsec_nanos();
|
|
let reduced_time_precision = 2_000_000; // 2ms in nanoseconds
|
|
let permissions = state.permissions.lock().unwrap();
|
|
|
|
// If the permission is not enabled
|
|
// Round the nano result on 2 milliseconds
|
|
// see: https://developer.mozilla.org/en-US/docs/Web/API/DOMHighResTimeStamp#Reduced_time_precision
|
|
if !permissions.allow_hrtime.is_allow() {
|
|
subsec_nanos -= subsec_nanos % reduced_time_precision
|
|
}
|
|
|
|
Ok(JsonOp::Sync(json!({
|
|
"seconds": seconds,
|
|
"subsecNanos": subsec_nanos,
|
|
})))
|
|
}
|