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9845361153
Partially supersedes #19016. This migrates `spawn` and `spawn_blocking` to `deno_core`, and removes the requirement for `spawn` tasks to be `Send` given our single-threaded executor. While we don't need to technically do anything w/`spawn_blocking`, this allows us to have a single `JoinHandle` type that works for both cases, and allows us to more easily experiment with alternative `spawn_blocking` implementations that do not require tokio (ie: rayon). Async ops (+~35%): Before: ``` time 1310 ms rate 763358 time 1267 ms rate 789265 time 1259 ms rate 794281 time 1266 ms rate 789889 ``` After: ``` time 956 ms rate 1046025 time 954 ms rate 1048218 time 924 ms rate 1082251 time 920 ms rate 1086956 ``` HTTP serve (+~4.4%): Before: ``` Running 10s test @ http://localhost:4500 2 threads and 10 connections Thread Stats Avg Stdev Max +/- Stdev Latency 68.78us 19.77us 1.43ms 86.84% Req/Sec 68.78k 5.00k 73.84k 91.58% 1381833 requests in 10.10s, 167.36MB read Requests/sec: 136823.29 Transfer/sec: 16.57MB ``` After: ``` Running 10s test @ http://localhost:4500 2 threads and 10 connections Thread Stats Avg Stdev Max +/- Stdev Latency 63.12us 17.43us 1.11ms 85.13% Req/Sec 71.82k 3.71k 77.02k 79.21% 1443195 requests in 10.10s, 174.79MB read Requests/sec: 142921.99 Transfer/sec: 17.31MB ``` Suggested-By: alice@ryhl.io Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com>
29 lines
1 KiB
Rust
29 lines
1 KiB
Rust
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
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use deno_core::task::MaskFutureAsSend;
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pub fn create_basic_runtime() -> tokio::runtime::Runtime {
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tokio::runtime::Builder::new_current_thread()
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.enable_io()
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.enable_time()
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// This limits the number of threads for blocking operations (like for
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// synchronous fs ops) or CPU bound tasks like when we run dprint in
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// parallel for deno fmt.
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// The default value is 512, which is an unhelpfully large thread pool. We
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// don't ever want to have more than a couple dozen threads.
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.max_blocking_threads(32)
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.build()
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.unwrap()
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}
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pub fn create_and_run_current_thread<F, R>(future: F) -> R
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where
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F: std::future::Future<Output = R> + 'static,
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R: Send + 'static,
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{
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let rt = create_basic_runtime();
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// SAFETY: this this is guaranteed to be running on a current-thread executor
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let future = unsafe { MaskFutureAsSend::new(future) };
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let join_handle = rt.spawn(future);
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rt.block_on(join_handle).unwrap().into_inner()
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}
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