perf(napi): reducer tokio future execution overhead

bench/Cargo.toml

@@ -8,7 +8,7 @@ version = "0.1.0"
 crate-type = ["cdylib"]
 
 [dependencies]
-napi = {path = "../napi", features = ["napi4", "serde-json"]}
+napi = {path = "../napi", features = ["tokio_rt", "serde-json"]}
 napi-derive = {path = "../napi-derive"}
 serde = "1"
 serde_json = "1"

bench/async.ts

@@ -1,6 +1,10 @@
 import b from 'benny'
 
-const { benchAsyncTask, benchThreadsafeFunction } = require('./index.node')
+const {
+  benchAsyncTask,
+  benchThreadsafeFunction,
+  benchTokioFuture,
+} = require('./index.node')
 
 const buffer = Buffer.from('hello 🚀 rust!')
 
@@ -10,7 +14,7 @@ export const benchAsync = () =>
     b.add('spawn task', async () => {
       await benchAsyncTask(buffer)
     }),
-    b.add('thread safe function', async () => {
+    b.add('ThreadSafeFunction', async () => {
       await new Promise<number | undefined>((resolve, reject) => {
         benchThreadsafeFunction(buffer, (err?: Error, value?: number) => {
           if (err) {
@@ -21,6 +25,9 @@ export const benchAsync = () =>
         })
       })
     }),
+    b.add('Tokio future to Promise', async () => {
+      await benchTokioFuture(buffer)
+    }),
     b.cycle(),
     b.complete(),
   )

bench/bench.ts

@@ -10,6 +10,7 @@ import { benchGetArray } from './get-array-from-js'
 import { benchGetSetProperty } from './get-set-property'
 import { benchNoop } from './noop'
 import { benchPlus } from './plus'
+import { benchQuery } from './query'
 
 async function run() {
   const output = [
@@ -20,6 +21,7 @@ async function run() {
     await benchGetArray(),
     await benchGetSetProperty(),
     await benchAsync(),
+    await benchQuery(),
   ]
     .map(formatSummary)
     .join('\n')

bench/query.ts

@@ -0,0 +1,19 @@
+import b from 'benny'
+
+const { query, engine } = require('./index.node')
+
+const e = engine('model A {}')
+
+export const benchQuery = () =>
+  b.suite(
+    'Query',
+    b.add('napi-rs', async () => {
+      await Promise.all(Array.from({ length: 100 }).map(() => query(e)))
+    }),
+    b.add('neon', async () => {
+      await query(e)
+    }),
+
+    b.cycle(),
+    b.complete(),
+  )

bench/src/async_compute.rs

@@ -51,8 +51,19 @@ fn bench_threadsafe_function(ctx: CallContext) -> Result<JsUndefined> {
   ctx.env.get_undefined()
 }
 
+#[js_function(1)]
+fn bench_tokio_future(ctx: CallContext) -> Result<JsObject> {
+  let buffer_ref = ctx.get::<JsBuffer>(0)?.into_ref()?;
+  ctx
+    .env
+    .execute_tokio_future(async move { Ok(buffer_ref.len()) }, |env, v: usize| {
+      env.create_uint32(v as u32 + 1)
+    })
+}
+
 pub fn register_js(exports: &mut JsObject) -> Result<()> {
   exports.create_named_method("benchAsyncTask", bench_async_task)?;
   exports.create_named_method("benchThreadsafeFunction", bench_threadsafe_function)?;
+  exports.create_named_method("benchTokioFuture", bench_tokio_future)?;
   Ok(())
 }

bench/src/lib.rs

@@ -18,6 +18,7 @@ mod get_set_property;
 mod get_value_from_js;
 mod noop;
 mod plus;
+mod query;
 
 #[module_exports]
 fn init(mut exports: JsObject, env: Env) -> Result<()> {
@@ -29,6 +30,7 @@ fn init(mut exports: JsObject, env: Env) -> Result<()> {
   get_set_property::register_js(&mut exports, &env)?;
   create_array::register_js(&mut exports)?;
   get_value_from_js::register_js(&mut exports)?;
+  query::register_js(&mut exports)?;
 
   Ok(())
 }

bench/src/query.rs

@@ -0,0 +1,63 @@
+use napi::{CallContext, JsExternal, JsObject, JsString};
+
+#[derive(Clone)]
+pub struct QueryEngine {
+  datamodel: String,
+}
+
+unsafe impl Sync for QueryEngine {}
+
+impl QueryEngine {
+  pub async fn query(&self) -> String {
+    let data = serde_json::json!({
+      "findFirstBooking": {
+        "id": "ckovh15xa104945sj64rdk8oas",
+        "name": "1883da9ff9152",
+        "forename": "221c99bedc6a4",
+        "description": "8bf86b62ce6a",
+        "email": "9d57a869661cc",
+        "phone": "7e0c58d147215",
+        "arrivalDate": -92229669,
+        "departureDate": 202138795,
+        "price": -1592700387,
+        "advance": -369294193,
+        "advanceDueDate": 925000428,
+        "kids": 520124290,
+        "adults": 1160258464,
+        "status": "NO_PAYMENT",
+        "nourishment": "BB",
+        "createdAt": "2021-05-19T12:58:37.246Z",
+        "room": { "id": "ckovh15xa104955sj6r2tqaw1c", "name": "38683b87f2664" }
+      }
+    });
+
+    serde_json::to_string(&data).unwrap()
+  }
+}
+
+#[js_function(1)]
+fn new_engine(ctx: CallContext) -> napi::Result<napi::JsExternal> {
+  let a = ctx.get::<JsString>(0)?.into_utf8()?;
+  let model = a.into_owned()?;
+  let model_len = model.len();
+  let qe = QueryEngine { datamodel: model };
+  ctx.env.create_external(qe, Some(model_len as i64))
+}
+
+#[js_function(1)]
+fn query(ctx: CallContext) -> napi::Result<JsObject> {
+  let ext = ctx.get::<JsExternal>(0)?;
+  let qe = ctx.env.get_value_external::<QueryEngine>(&ext)?;
+  let qe = qe.clone();
+  ctx
+    .env
+    .execute_tokio_future(async move { Ok(qe.query().await) }, |env, v| {
+      env.create_string_from_std(v)
+    })
+}
+
+pub fn register_js(exports: &mut JsObject) -> napi::Result<()> {
+  exports.create_named_method("engine", new_engine)?;
+  exports.create_named_method("query", query)?;
+  Ok(())
+}

napi/Cargo.toml

@@ -21,7 +21,7 @@ napi6 = ["napi5", "napi-sys/napi6"]
 napi7 = ["napi6", "napi-sys/napi7"]
 napi8 = ["napi7", "napi-sys/napi8"]
 serde-json = ["serde", "serde_json"]
-tokio_rt = ["futures", "tokio", "once_cell", "napi4"]
+tokio_rt = ["tokio", "once_cell", "napi4"]
 
 [dependencies]
 napi-sys = {version = "1", path = "../sys"}
@@ -33,10 +33,6 @@ winapi = {version = "0.3.9", features = ["winuser", "minwindef", "ntdef", "liblo
 optional = true
 version = "0.8"
 
-[dependencies.futures]
-optional = true
-version = "0.3"
-
 [dependencies.tokio]
 features = ["rt", "rt-multi-thread", "sync"]
 optional = true

napi/src/env.rs

@@ -5,6 +5,11 @@ use std::mem;
 use std::os::raw::{c_char, c_void};
 use std::ptr;
 
+#[cfg(all(feature = "tokio_rt", feature = "napi4"))]
+use once_cell::sync::Lazy;
+#[cfg(all(feature = "tokio_rt", feature = "napi4"))]
+use tokio::{runtime::Handle, sync::mpsc};
+
 use crate::{
   async_work::{self, AsyncWorkPromise},
   check_status,
@@ -24,19 +29,44 @@ use crate::js_values::{De, Ser};
 use crate::promise;
 #[cfg(feature = "napi4")]
 use crate::threadsafe_function::{ThreadSafeCallContext, ThreadsafeFunction};
-#[cfg(all(feature = "tokio_rt", feature = "napi4"))]
-use crate::tokio_rt::{get_tokio_sender, Message};
 #[cfg(all(feature = "serde-json"))]
 use serde::de::DeserializeOwned;
 #[cfg(all(feature = "serde-json"))]
 use serde::Serialize;
 #[cfg(all(feature = "tokio_rt", feature = "napi4"))]
 use std::future::Future;
-#[cfg(all(feature = "tokio_rt", feature = "napi4"))]
-use tokio::sync::mpsc::error::TrySendError;
 
 pub type Callback = extern "C" fn(sys::napi_env, sys::napi_callback_info) -> sys::napi_value;
 
+#[cfg(all(feature = "tokio_rt", feature = "napi4"))]
+static RT: Lazy<(Handle, mpsc::Sender<()>)> = Lazy::new(|| {
+  let rt = tokio::runtime::Runtime::new();
+  let (tx, mut rx) = mpsc::channel::<()>(1);
+  rt.map(|rt| {
+    let h = rt.handle();
+    let handle = h.clone();
+    handle.spawn(async move {
+      if rx.recv().await.is_some() {
+        rt.shutdown_background();
+      }
+    });
+
+    (handle, tx)
+  })
+  .expect("Create tokio runtime failed")
+});
+
+#[doc(hidden)]
+#[cfg(all(feature = "tokio_rt", feature = "napi4"))]
+#[inline(never)]
+pub fn shutdown_tokio_rt() {
+  let sender = &RT.1;
+  sender
+    .clone()
+    .try_send(())
+    .expect("Shutdown tokio runtime failed");
+}
+
 #[derive(Clone, Copy)]
 /// `Env` is used to represent a context that the underlying N-API implementation can use to persist VM-specific state.
 ///
@@ -1093,6 +1123,8 @@ impl Env {
     fut: F,
     resolver: R,
   ) -> Result<JsObject> {
+    let handle = &RT.0;
+
     let mut raw_promise = ptr::null_mut();
     let mut raw_deferred = ptr::null_mut();
     check_status!(unsafe {
@@ -1103,19 +1135,7 @@ impl Env {
     let future_promise =
       promise::FuturePromise::create(raw_env, raw_deferred, Box::from(resolver))?;
     let future_to_resolve = promise::resolve_from_future(future_promise.start()?, fut);
-    let sender = get_tokio_sender().clone();
+    handle.spawn(future_to_resolve);
-    sender
-      .try_send(Message::Task(Box::pin(future_to_resolve)))
-      .map_err(|e| match e {
-        TrySendError::Full(_) => Error::new(
-          Status::QueueFull,
-          "Failed to run future: no available capacity".to_owned(),
-        ),
-        TrySendError::Closed(_) => Error::new(
-          Status::Closing,
-          "Failed to run future: receiver closed".to_string(),
-        ),
-      })?;
     Ok(unsafe { JsObject::from_raw_unchecked(self.0, raw_promise) })
   }
 

napi/src/lib.rs

@@ -95,8 +95,7 @@ mod task;
 pub use cleanup_env::CleanupEnvHook;
 #[cfg(feature = "napi4")]
 pub mod threadsafe_function;
-#[cfg(all(feature = "tokio_rt", feature = "napi4"))]
+
-mod tokio_rt;
 mod version;
 #[cfg(target_os = "windows")]
 mod win_delay_load_hook;
@@ -113,9 +112,6 @@ pub use status::Status;
 pub use task::Task;
 pub use version::NodeVersion;
 
-#[cfg(all(feature = "tokio_rt", feature = "napi4"))]
-pub use tokio_rt::shutdown as shutdown_tokio_rt;
-
 #[cfg(feature = "serde-json")]
 #[macro_use]
 extern crate serde;

napi/src/promise.rs

@@ -1,8 +1,7 @@
+use std::future::Future;
 use std::os::raw::{c_char, c_void};
 use std::ptr;
 
-use futures::prelude::*;
-
 use crate::{check_status, sys, Env, JsError, NapiRaw, Result};
 
 pub struct FuturePromise<T, V: NapiRaw> {

napi/src/tokio_rt.rs

@@ -1,54 +0,0 @@
-use std::env::var;
-use std::ffi::c_void;
-use std::pin::Pin;
-use std::thread::spawn;
-use std::time::Duration;
-
-use futures::future::Future;
-use once_cell::sync::OnceCell;
-use tokio::runtime::Runtime;
-use tokio::sync::mpsc;
-
-use crate::Error;
-
-pub(crate) enum Message {
-  Task(Pin<Box<dyn Future<Output = ()> + Send>>),
-  Shutdown,
-}
-
-static SENDER: OnceCell<mpsc::Sender<Message>> = OnceCell::new();
-
-#[inline]
-pub(crate) fn get_tokio_sender() -> &'static mpsc::Sender<Message> {
-  SENDER.get_or_init(|| {
-    let buffer_size = var("NAPI_RS_TOKIO_CHANNEL_BUFFER_SIZE")
-      .map_err(|_| ())
-      .and_then(|s| s.parse().map_err(|_| ()))
-      .unwrap_or(100);
-    let (sender, mut receiver) = mpsc::channel(buffer_size);
-    spawn(move || {
-      let rt = Runtime::new().expect("Failed to create tokio runtime");
-      rt.block_on(async {
-        loop {
-          match receiver.recv().await {
-            Some(Message::Task(fut)) => fut.await,
-            Some(Message::Shutdown) => break,
-            None => {}
-          }
-        }
-      });
-      rt.shutdown_timeout(Duration::from_secs(5));
-    });
-
-    sender
-  })
-}
-
-#[doc(hidden)]
-pub unsafe extern "C" fn shutdown(_data: *mut c_void) {
-  let sender = get_tokio_sender().clone();
-  sender
-    .try_send(Message::Shutdown)
-    .map_err(|e| Error::from_reason(format!("Shutdown tokio runtime failed: {}", e)))
-    .unwrap()
-}

test_module/__test__/napi4/tokio_rt-isolate.spec.ts

@@ -1,28 +0,0 @@
-import { join } from 'path'
-
-import test from 'ava'
-
-import { napiVersion } from '../napi-version'
-
-const filepath = join(__dirname, './example.txt')
-
-process.env.NAPI_RS_TOKIO_CHANNEL_BUFFER_SIZE = '1'
-
-const bindings = require('../../index.node')
-
-test('should be able adjust queue size via process.env', async (t) => {
-  if (napiVersion < 4) {
-    t.is(bindings.testExecuteTokioReadfile, undefined)
-    return
-  }
-  try {
-    await Promise.all(
-      Array.from({ length: 50 }).map((_) =>
-        bindings.testExecuteTokioReadfile(filepath),
-      ),
-    )
-    throw new TypeError('Unreachable')
-  } catch (e) {
-    t.snapshot({ code: e.code, message: e.message })
-  }
-})

test_module/__test__/napi4/tokio_rt-isolate.spec.ts.md

@@ -1,14 +0,0 @@
-# Snapshot report for `test_module/__test__/napi4/tokio_rt-isolate.spec.ts`
-
-The actual snapshot is saved in `tokio_rt-isolate.spec.ts.snap`.
-
-Generated by [AVA](https://avajs.dev).
-
-## should be able adjust queue size via process.env
-
-> Snapshot 1
-
-    {
-      code: 'QueueFull',
-      message: 'Failed to run future: no available capacity',
-    }

test_module/__test__/napi4/tokio_rt.spec.ts

@@ -47,20 +47,3 @@ test.serial('should be able to execute future paralleled', async (t) => {
     t.deepEqual(readFileSync(filepath), fileContent)
   }
 })
-
-test.serial('should reject if task queue is full', async (t) => {
-  if (napiVersion < 4) {
-    t.is(bindings.testExecuteTokioReadfile, undefined)
-    return
-  }
-  try {
-    await Promise.all(
-      Array.from({ length: 1000 * 1000 }).map((_) =>
-        bindings.testExecuteTokioReadfile(filepath),
-      ),
-    )
-    throw new TypeError('Unreachable')
-  } catch (e) {
-    t.snapshot({ code: e.code, message: e.message })
-  }
-})

test_module/__test__/napi4/tokio_rt.spec.ts.md

@@ -1,14 +0,0 @@
-# Snapshot report for `test_module/__test__/napi4/tokio_rt.spec.ts`
-
-The actual snapshot is saved in `tokio_rt.spec.ts.snap`.
-
-Generated by [AVA](https://avajs.dev).
-
-## should reject if task queue is full
-
-> Snapshot 1
-
-    {
-      code: 'QueueFull',
-      message: 'Failed to run future: no available capacity',
-    }

test_module/__test__/serde/ser.spec.ts.md

@@ -4,23 +4,11 @@ The actual snapshot is saved in `ser.spec.ts.snap`.
 
 Generated by [AVA](https://avajs.dev).
 
-## serialize make_buff from bindings
+## serialize make_num_77 from bindings
 
 > Snapshot 1
 
-    Buffer @Uint8Array [
+    77
-      fffefd
-    ]
-
-## serialize make_map from bindings
-
-> Snapshot 1
-
-    {
-      a: 1,
-      b: 2,
-      c: 3,
-    }
 
 ## serialize make_num_32 from bindings
 
@@ -28,11 +16,11 @@ Generated by [AVA](https://avajs.dev).
 
     32
 
-## serialize make_num_77 from bindings
+## serialize make_str_hello from bindings
 
 > Snapshot 1
 
-    77
+    'Hello World'
 
 ## serialize make_num_array from bindings
 
@@ -51,6 +39,14 @@ Generated by [AVA](https://avajs.dev).
       9,
     ]
 
+## serialize make_buff from bindings
+
+> Snapshot 1
+
+    Buffer @Uint8Array [
+      fffefd
+    ]
+
 ## serialize make_obj from bindings
 
 > Snapshot 1
@@ -66,6 +62,16 @@ Generated by [AVA](https://avajs.dev).
       c: 'Hi',
     }
 
+## serialize make_map from bindings
+
+> Snapshot 1
+
+    {
+      a: 1,
+      b: 2,
+      c: 3,
+    }
+
 ## serialize make_object from bindings
 
 > Snapshot 1
@@ -122,9 +128,3 @@ Generated by [AVA](https://avajs.dev).
       q: 9998881288248882845242411222333n,
       r: -340282363588614574563373375108745990111n,
     }
-
-## serialize make_str_hello from bindings
-
-> Snapshot 1
-
-    'Hello World'